Headcanons

This page is for putting any headcanons (your own theories, not officially recognised) relating to the musical and the characters of Cats. Please remember that this is a fanon page. Feel free to add any headcanons you might have, but don't delete other people's ideas.

Theories

 * Admetus is a ginger and white short-haired stray.
 * Plato is a tabby.
 * Admetus and Macavity are in some way linked, perhaps as relations, or a split personality Jekyll/Hyde.
 * Skimbleshanks is Victoria's father, and he arranged the pairing between Victoria and Plato. He did this because he wants only the best for his daughter, and Plato has always seemed like a respectful young tom, but little does he know, Plato is quite shallow...

Relationships

 * Admetus: In productions where there is both Admetus and Plato, such as the movie, they might be siblings.
 * Asparagus: might be Admetus' father
 * Bombalurina: might be mates
 * Demeter: might be mates
 * Etcetera: might be siblings or mates.
 * Jellylorum: might be Admetus' mother
 * Macavity: might be Admetus' father, brother, or alter-ego.
 * Mistoffelees: might be his brother or adopted brother.
 * Plato: In productions where there is both Admetus and Plato, such as the movie, they might be siblings.
 * Pouncival: might be brothers.
 * Tumblebrutus: might be brothers.
 * Victoria: In some productions they dance the Mating Dance together. Might be mates, or his adopted sister.

Theories

 * London-based Alonzo is a black and white spotted cat
 * Broadway-based Alonzo is a tabby alley cat.
 * Alonzo is possibly a black and white Turkish Van or a British shorthair due to the texture coloring of the coat.
 * Alonzo is Bustopher Jones' nephew, (hence the similar colorings) but because he's a scrappy alley cat, Bustopher doesn't want to acknowledge him as family.
 * To add on to this, in the film, when Alonzo saved Demeter from Macavity, his motive might have been his mother. Maybe his mother was in an abusive relationship, that's how he was born, and this is why Bustopher shuns him.

Relationships

 * Asparagus: might be Alonzo's father.
 * Bombalurina: might be mates.
 * Bustopher Jones: might be Alonzo's father, uncle, or brother.
 * Cassandra: might be mates - this is indicated onstage in UK-based productions.
 * Demeter: might be mates - this is indicated onstage in Broadway-based productions.
 * Electra: might be mates.
 * Etcetera: might be mates.
 * Grizabella: might be Alonzo's mother.
 * Jellylorum: might be Alonzo's mother.
 * Jemima: might be Alonzo's mate or sister.
 * Macavity: might be Alonzo's brother.
 * Mistoffelees: might be Alonzo's brother.
 * Munkustrap: might be Alonzo's brother or mate.
 * Old Deuteronomy: might be Alonzo's father.
 * Pouncival: might be Alonzo's brother.
 * Rum Tum Tugger: might be Alonzo's brother.
 * Tumblebrutus: might be Alonzo's brother.
 * Victoria: might be Alonzo's mate or sister. In some productions they dance the Mating Dance together.

Theories

 * Asparagus is a long-haired sandy tabby.


 * In the film version, Asparagus is a separate character from Gus the Theatre Cat. Most fans consider them separate, Asparagus in the ensemble is much livelier and younger than Gus the Theatre Cat.
 * Asparagus the basic ensemble character is named "Peter" in the Broadway Revival.

Relationships

 * Admetus: might be Asparagus' son.
 * Alonzo: might be Asparagus' son.
 * Etcetera: might be Asparagus' daughter.
 * Gus: Might be Asparagus' father or grandfather
 * Jellylorum: might be mates, or siblings.
 * Jennyanydots: might be mates, or siblings.
 * Mistoffelees: might Asparagus' son or adopted son.
 * Plato: might be Asparaguss' son.
 * Pouncival: might be Asparagus' son.
 * Skimbleshanks: might be siblings.
 * Tumblebrutus: might be Asparagus' son.
 * Victoria: might be Asparagus' daughter or adopted daughter.

Theories

 * Bill Bailey is a tabby and white kitten, with patches of tabby stripes and spots on a white body.
 * Possibly a Burmese cat breed, or a scruffy short-haired alleycat.
 * The name "Bill Bailey" is used for the ensemble character of Rum Tum Tugger in the Broadway revival, who is unrelated to the Bill Bailey/Tumblebrutus kitten.

Relationships

 * Alonzo: might be brothers.
 * Asparagus: might be his father.
 * Electra: might be siblings, or mates.
 * Etcetera: might be siblings, or mates.
 * Jellylorum: might be his mother.
 * Jemima: might be siblings, or mates. They are seen dancing together in some productions.
 * Jennyanydots: might be his mother.
 * Mistoffelees: might be brothers or close friends.
 * Pouncival: might be brothers.
 * Skimbleshanks: might be his father.
 * Tantomile: might be mates, or close friends.
 * Victoria: might be siblings or his adopted sister.

Theories

 * Bombalurina is a bright Torbie and white - her ginger colour exaggerated onstage, but she has patches of black stripes over a bright ginger, and a white bib.


 * Bombalurina and Demeter are sisters, who both were involved in Macavity's gang. Macavity was in an abusive relationship with Demeter, leading to conflicting emotions for Bombalurina.


 * Grizabella is Bombalurina and Demeter's mother, and abandoned them to continue her glamorous lifestyle. She inherited her looks and confidence from her mother, and she understands her but resents her abandoning them.


 * Bombalurina is possibly a Somali cat breed.

Relationships

 * Alonzo: might be mates.
 * Bustopher Jones: might be a close friend of his, might be a fan along with Jennyanydots and Jellylorum but not so much as she is a fan of Tugger.
 * Coricopat: may be her son with Macavity his father.
 * Demeter: There is much debate about the relationship between these two. There is speculation that they might be sisters, mother and daughter, mates, or close friends. Depending on the age of each cat in the production, Demeter may be seen as Bombalurina's mother or vice versa.
 * Electra: might be Bombalurina's cousin, or close friend.
 * Gus: might be a relation of Gus the Theatre Cat
 * Grizabella: might be Bombalurina's mother
 * Jennyanydots: might be Bombalurina's mother
 * Macavity: There is debate about the relationship of these characters. Fans speculate that Macavity may be Bombalurina's father, brother, or mate. What is for sure is that Bombalurina knows a lot about Macavity, and is less afraid of him than Demeter is.
 * Munkustrap: might be mates.
 * Pouncival: might be mates. Pouncival is seen flirting with Bombalurina
 * Rum Tum Tugger: might be mates. Bombalurina flirts with him during his solo, and they dance the pas de deux.
 * Sillabub: might be Bombalurina's niece, daughter, or friend.
 * Skimbleshanks: might be Bombalurina's father.
 * Mistoffelees: might be Bombalurina's son.
 * Victoria: might be Bombalurina's daughter.

Theories

 * Bustopher Jones is a well-fed, plush black short-hair, with a white bib and white paws (his white "spats")
 * Bustopher Jones is possibly a British or Exotic Shorthair or an oversized Bombay cat breed.
 * Alonzo is Bustopher Jones' nephew, (hence the similar colorings) but because he's a scrappy alley cat, Bustopher doesn't want to acknowledge him as family.
 * To add on to this, in the film, when Alonzo saved Demeter from Macavity, his motive might have been his mother. Maybe his mother was in an abusive relationship, that's how he was born, and this is why Bustopher shuns him.
 * Mistoffelees is also Bustopher's nephew, but because he's a purebred tuxedo cat, and has been well educated and lives with a wealthy family, Bustopher takes great pride in being his uncle.

Relationships

 * Alonzo: might be his son, his nephew, or his brother.
 * Jellylorum: might be his mate.
 * Jennyanydots: might be his mate. She is shown to be a great admirer of him in his solo.
 * Mistoffelees: might be his son or nephew.
 * Tumblebrutus: might be his nephew
 * Victoria: might be his daughter or his niece

Theories

 * Carbucketty is a tabby and white kitten/teen.
 * Carbucketty and Bill Bailey (or Pouncival and Tumblebrutus) are best friends, and one is the youngest kitten in the tribe, the other is older. Which is which depends on the production.

Relationships

 * Alonzo : might be be brothers.
 * Asparagus : might be Pouncival's father.
 * Bombalurina : might be mates. Pouncival is seen flirting with Bombalurina.
 * Electra : might be siblings or mates.
 * Etcetera : might be siblings or mates.
 * Jellylorum : might be Pouncival's mother.
 * Jemima : might be siblings or mates.
 * Jennyanydots : might be Pouncival's mother.
 * Mistoffelees: might be brothers or his adopted brother.
 * Old Deuteronomy : might be his father or uncle.
 * Skimbleshanks : might be Pouncival's father.
 * Tumblebrutus : might be siblings.
 * Victoria: might be siblings or his adopted sister.

Theories

 * Cassandra is some form of exotic breed, possibly Abysinnian, Siamese, Havana Brown, or Burmese.

Relationships

 * Alonzo: might be mates. This is indicated onstage in UK-based productions.
 * Coricopat: might be relatives, mates, or good friends.
 * Exotica: might be her daughter or they may be sisters.
 * Mistoffelees: might be mates as in some productions they are paired during the Pas De Deux.
 * Old Deuteronomy: might be her father.
 * Rum Tum Tugger: might be mates.
 * Tantomile: might be relatives or good friends.
 * Tumblebrutus: might be mates.

Theories

 * Coricopat and Tantomile are strongly marked Tabby and white. He has less white on his bib than Tantomile. They are almost identical.
 * Coricopat and Tantomile are possibly of the Abysinnian, Burmese, or Somali cat breed.
 * Coricopat and Tantomile are mystical, psychic, or magical in some way.

Relationships

 * Bombalurina: may be Coricopat's mother
 * Carbucketty: could be really close friends
 * Cassandra: might be mates, or good friends.
 * Electra: might be mates or his adopted daughter.
 * Exotica: might be a distant relative of Coricopat, or possibly a close friend. might be mates.
 * Jemima: might be mates or siblings.
 * Jennyanydots: might have adopted him with Skimbleshanks
 * Macavity: might be Coricopat's father.
 * Mistoffelees: might be close friend.
 * Old Deuteronomy: might be Coricopat's father or grandfather.
 * Rumpleteazer: might be mates
 * Rum Tum Tugger: might be Coricopat's uncle or cousin.
 * Skimbleshanks: might have adopted him
 * Tantomile: Coricopat and Tantomile are the telepathic/mystical twins.

Theories

 * Demeter is a Torbie and white - her costume design is stylised but shows black stripes and patches over a golden ginger base, with a white bib.
 * Bombalurina and Demeter are sisters, who both were involved in Macavity's gang. Macavity was in an abusive relationship with Demeter.
 * Grizabella is Bombalurina and Demeter's mother, and abandoned them to continue her glamorous lifestyle. Demeter has a lot of empathy for Grizabella, but lacks the confidence to displease Bombalurina by reaching out to her.
 * Demeter is possibly a Somali, Turkish Angora, or mixed cat breed.

Relationships

 * Alonzo: might be mates. This is indicated onstage in Broadway-based productions.
 * Bombalurina: There is much debate about the relationship between these two. There is speculation that they might be sisters, mother and daughter, mates, or close friends. Depending on the age of each cat in the production, Demeter may be seen as Bombalurina's mother or vice versa.
 * Coricopat:might be mates
 * Electra: might be cousins or close friends.
 * Electra: might be mother of Electra, by Munkustrap.
 * Grizabella: might be Demeter's mother.
 * Jennyanydots: might be Demeter's mother.
 * Jemima: might be Demeter's daughter, or adoptive daughter, possibly by Macavity. might be sisters or just good friends.
 * Macavity: Macavity has an abusive past with Demeter, which is, according to a list of Matinee Lines he tells her "I'll be back for you!" as he takes off with Old Deuteronomy kidnapped.
 * Mistoffelees: might be mother of Mistoffelees, by Macavity
 * Munkustrap: might be mates. This is indicated onstage in UK-based productions.
 * Rumpleteazer: might be good friends.
 * Skimbleshanks : might be Demeter's father.
 * Victoria: might be Victoria's mother, by Macavity.

Theories

 * Electra is a dark Torbie without white patches.
 * Electra is possibly an Ocicat, a Somali, or a short-haired scruffy mog.

Relationships

 * Bombalurina: might be Electra's mother, cousin, or close friend.
 * Coricopat: might be Electra's mate Or may have adopted her.
 * Demeter: might be Electra's mother, cousin, or close friend.
 * Etcetera: might be sisters, might be Electra's daughter or friends.
 * Grizabella: might be Electra's mother.
 * Jellylorum: might be Electra's mother.
 * Jemima: might be sisters, friends, or cousins.
 * Jennyanydots: might be Electra's mother.
 * Mistoffelees: might be mates as they are seen in some productions during the Pas De Deux.
 * Munkustrap: might be her brother.
 * Old Deuteronomy: might be Electra's father.
 * Pouncival: might be siblings, or mates.
 * Rum Tum Tugger: might be siblings.
 * Skimbleshanks: might be Electra's father.
 * Tumblebrutus: might be siblings, or mates.
 * Victoria: might be sisters.

Theories

 * Etcetera is a dilute Tabby and White. Possibly a very light colored bengal or mixed breed.

Relationships

 * Electra: might be sisters.
 * Jellylorum: might be Etcetera's mother.
 * Jemima: might be sisters.
 * Jennyanydots: might be Etcetera's mother.
 * Pouncival: might be siblings, or mates.
 * Rum Tum Tugger: might be his mate, or just his biggest fan.
 * Skimbleshanks: might be Etcetera's father.
 * Tumblebrutus: might be siblings, or mates.
 * Victoria: might be siblings.

Theories

 * Exotica may be Abysinnian, like Cassandra, or Siamese, Havana Brown, or Sokoke cat breed as she is later seen having a tabby gray coloring.
 * Exotica is a house cat who is not allowed outside, she is only seen in the junkyard when she escapes.

Relationships

 * Cassandra: might be sisters.
 * Coricopat: might be mates, or distant relatives.
 * Tantomile: might be distant relatives, or simply friends.
 * Rum Tum Tugger: might be mates.

Theories

 * George is a Tabby and white.
 * George is sometimes mistaken for Bill Bailey/Tumblebrutus, but he typically has patches on both eyes not just one.

Relationships

 * Bill Bailey: might be brothers, or good friends
 * Rumpleteazer: he might have a crush on her.
 * Tantomile: might good friends or have a crush on her.
 * Victor: might be brothers, or good friends

Theories

 * Griddlebone is an agent of Macavity's - she was sent to distract Growltiger to allow the Siamese to get close enough to attack. This is why she escapes with ease.
 * She may be entirely mythical, and never have existed.
 * Griddlebone is possibly an all-white Turkish Van, Persian, or British longhair.

Relationships

 * Growltiger: They are always portrayed as lovers, but this may not be sincere on her part.
 * Macavity: might be mates. She is described as an agent of his.

Theories

 * Grizabella is a sandy tabby.
 * Babygriz, that we see in the ensemble at the start of the show, is actually Grizabella re-born from the Heaviside layer as an innocent, joyful kitten. She doesn't remember her past but she treasures her youth and beauty. What happens after the end of the show is actually shown in the beginning.
 * Grizabella is possibly a Sokoke, a Nebelung or a Laperm cat breed.

Relationships

 * Bombalurina: might be Grizabella's daughter.
 * Cassandra: might be her daughter.
 * Demeter: might be Grizabella's daughter.
 * Electra: might be Grizabella's daughter.
 * Jemima: might be Grizabella's daughter or granddaughter.
 * Macavity: might be Macavity's mother.
 * Munkustrap: might be Munkustrap's mother.
 * Old Deuteronomy: might have been mates.
 * Rum Tum Tugger: might be Rum Tum Tugger's mother.

Theories

 * Growltiger might have existed, or he might be a mythical character.

Relationships

 * Griddlebone: might be lovers, she might be a decoy to distract him.

Theories

 * Jellylorum is a dilute tabby and white.

Relationships

 * Asparagus: might be mates.
 * Bombalurina: might be Jellylorum's daughter.
 * Demeter: might be Jellylorum's daughter.
 * Electra: might be Jellylorum's daughter.
 * Etcetera: might be Jellylorum's daughter.
 * Gus: might be her father or grandfather.
 * Jemima: might be Jellylorum's daughter.
 * Jennyanydots: might be sisters.
 * Mistoffelees: might be Jellylorum's son.
 * Pouncival: might be Jellylorum's son.
 * Skimbleshanks: might be mates.
 * Tumblebrutus: might be Jellylorum's son.
 * Victoria: might be Jellylorum's daughter.

Theories

 * Jemima is a Tortie and white.
 * Jemima, Demeter, Bombalurina and Tugger all live with the same humans who like to put spiked collars on their cats to help protect them. Bombalurina, Demeter and Jemima are related but Tugger is not.
 * Jemima is possibly a Turkish Angora, Somali, or a mixed breed.
 * Jemima and Electra are related to Skimbleshanks, Possibly their father.

Relationships

 * Alonzo: might be mates or siblings, as they are flirting at the Ball.
 * Bombalurina: might be Jemima's mother, sister, aunt or friend because of the similar markings.
 * Demeter: might be Jemima's mother, sister, aunt or friend because of their interactions and colors.
 * Coricopat: might be Jemima's mate or brother
 * Electra: might be sisters or close friends.
 * Etcetera: might be close friends.
 * Grizabella: might be her mother or grandmother, as Jemima is the first to reach out to her and to empathize with her.
 * Jellylorum: might be Jemima's mother.
 * Jennyanydots: might be Jemima's mother or grandmother.
 * Macavity: might be Jemima's father due to Macavity's history with Demeter, and inherited psychic powers.
 * Mistoffelees: might be siblings, mates or close friends. (Main Article: Jemistoffelees)
 * Munkustrap: might be Jemima's father. might be mates due to the sweet interactions or similar markings.
 * Old Deuteronomy: might be her father or grandfather, seeing that she has a connection with him and he chooses her to understand the meaning of "Moments of Happiness".
 * Pouncival: might be siblings or mates, as they are often seen together.
 * Rum Tum Tugger: might be siblings or mates, or he is her uncle. Tugger is seen interacting with her throughout, seeming to single her out from the other kittens.
 * Skimbleshanks: might be Jemima's father or grandfather, as he is seen pulling Jemima back from Grizabella, holding her.
 * Tantomile:might be her sister.
 * Tumblebrutus: might be siblings or mates, as they are seen together during the Pas de Deux.
 * Victoria: Might be close friends or siblings, as they are often together.

Theories

 * Jennyanydots is specified as a Tabby - "Her coat is of the tabby kind, with tiger stripes and leopard spots"
 * Jennyanydots is possibly an Ocicat or a Scottish Fold.

Relationships

 * Asparagus: might be mates, or siblings.
 * Bombalurina: might be Jennyanydots' daughter.
 * Bustopher Jones: might be Jennyanydots' mate, as she clearly admires him in his solo.
 * Coricopat: might be her son or adopted.
 * Demeter: might be Jennyanydots' daughter.
 * Jellylorum: might be siblings, or just friends.
 * Jemima: might be Jennyanydots' daughter.
 * Mistoffelees: might be her son.
 * Mungojerrie: might be Jennyanydots' son.
 * Pouncival: might be Jennyanydots' son.
 * Rumpleteazer: might be Jennyanydots' daughter.
 * Skimbleshanks: might be mates or siblings.
 * Tantomile: might be her daughter or adopted.
 * Victoria: might be her daughter.

Theories

 * Macavity is specified as "...a ginger cat, he's very tall and thin"
 * Macavity has magical abilities, such as levitation and invisibility. This has led to the theory he might be related to the other magical cats, Mistoffelees, Coricopat, Tantomile and Jemima.

Relationships

 * Alonzo: might be rivals for Demeter
 * Bombalurina: might be Macavity's daughter with Demeter. might have been lovers. Bombalurina is shown to have a slightly different opinion than Demeter, she finds Macavity more attractive, and less frightening.
 * Coricopat: might be Macavity's son
 * Demeter: They have an abusive history, in the Matinee Lines while kidnapping Old Deuteronomy, Macavity says "I'll be back for you!" to Demeter. Demeter is petrified of Macavity, and assumes and startling noise is his return.
 * Mistoffelees: might be Macavity's son, due them both having a magical ability. might be brothers.
 * Munkustrap: might be brothers. might be rivals for Demeter.
 * Old Deuteronomy: might be Macavity's father, or Grandfather.
 * Rum Tum Tugger: might be brothers.
 * Tantomile:might be his daughter.

Theories

 * Mistoffelees is described as "black from his ears to the tip of his tail", however we see him onstage as a Black and White/Tuxedo cat. Fans use either version of his appearance.
 * If he is all black, he might be a Bombay or an all- black Turkish Angora cat breed or a mixed breed cat.

Relationships

 * Bustopher Jones: might be Mistoffelees' uncle, his close friend or his father.
 * Carbucketty: might be brothers, or mates.
 * Cassandra: might be mates.
 * Coricopat: might be good friends
 * Electra: might be mates.
 * Etcetera: might be cousins.
 * Jemima: might be mates or close friends. Main article:  Jemistoffelees
 * Jennyanydots: might be his mother by Bustopher Jones
 * Macavity: might be Mistoffelees' father.
 * Munkustrap: might be his uncle, or brother.
 * Old Deuteronomy: might be Mistoffelees' grandfather.
 * Rumpleteazer: might be Mistoffelees' mate or close friend.
 * Rum Tum Tugger: might be his uncle, brother, or mate. They have an unusual relationship, Misto is the only younger cat to not be impressed with Tugger's antics, yet Tugger is in awe of Misto's abilities and sings his solo. Main article: Tugstoffelees
 * Victoria: might be be mates, siblings, or just close friends. Main article:  Mistoria
 * Bombalurina: might be his mother.

Theories

 * Mungojerrie is a Tabby and white, very similar in appearance to Rumpleteazer. Possibly a Bengal cat breed.
 * He and Rumpleteazer may have had connections with Macavity at some point, given their personalities and interactions with him onstage.

Relationships

 * Bombalurina: might be mates.
 * Bustopher Jones: might be Mungojerrie's father.
 * Jellylorum: might be Mungojerrie's mother.
 * Jennyanydots: might be Mungojerrie's mother.
 * Macavity: might be Mungojerrie's father.
 * Rumpleteazer: might be Mungojerrie's twin, sister, or mate.
 * Rum Tum Tugger (Street Cat): might be close friends.
 * Skimbleshanks: might be Mungojerrie's father.
 * Tantomile: might be Mungojerrie's mate.

Theories

 * Munkustrap is a short-haired Silver Tabby.
 * Munkustrap and Tugger are confirmed as Old Deuteronomy's sons in UK-based productions.
 * There is a further theory that Macavity is also their brother, and his estrangement and anger is the cause of him kidnapping his father.
 * Munkustrap is possibly an Egyptian Mau or a Turkish Angora cat breed.

Relationships

 * Alonzo: might be Munkustrap's brother or mate.
 * Cassandra: might be mates - this is indicated onstage in Broadway-based productions.
 * Demeter: might be mates - this is indicated onstage in UK-based productions.
 * Electra: might be Munkustrap's daughter by Demeter.
 * Grizabella: might be Munkustrap's mother.
 * Jemima: might be Munkustrap's daughter, or adopted daughter. might be Munkustrap's mate.
 * Macavity: might be Munkustrap's brother.
 * Mistoffelees: might be his son by Demeter, or his nephew.
 * Old Deuteronomy: confirmed in UK productions that Old Deuteronomy is Munkustrap's father.
 * Rum Tum Tugger: confirmed in UK productions that Rum Tum Tugger is Munkustrap's brother.
 * Rumpleteazer: might be mates.
 * Victoria: might be Munkustrap's daughter by Demeter.

Theories

 * Old Deuteronomy is a long-haired silver tabby. Possibly a Nebelung, Norwegian Forest, or a Turkish Angora cat breed.
 * Old Deuteronomy has had many wives, and consequently many children. It is suggested most of the tribe are related to him in one way or another.
 * It is confirmed in UK productions that Old Deuteronomy is father to both Munkustrap and Rum Tum Tugger
 * Fans speculate further that Macavity is also their brother, and it is his estranged son who kidnaps Old Deuteronomy.
 * The Broadway revival names Deuteronomy's ensemble costume "Victor", unrelated to the cat of that name.

Relationships

 * Alonzo: might be Old Deuteronomy's son.
 * Coricopat: might be Old Deuteronomy's son or grandson.
 * Grizabella: might have been mates or friends.
 * Gus the Theatre Cat: might be close friends.
 * Jemima: might be Old Deuteronomy's daughter or granddaughter.
 * Macavity: might be Old Deuteronomy's son.
 * Mistoffelees: might be nephew, or grandson.
 * Munkustrap: confirmed in UK productions that Munkustrap is Old Deuteronomy's son.
 * Rum Tum Tugger: confirmed in UK productions that Rum Tum Tugger is Old Deuteronomy's son.
 * Skimbleshanks: might be good friends.
 * Tantomile: might be his daughter or grandaughter.
 * Victoria: might be daughter or granddaughter.

Theories

 * Rum Tum Tugger is a long-haired dark tabby, possibly with Maine Coon, Norwegian Forest, or Turkish Angora cat genetics.
 * It is confirmed in UK - based productions that Munkustrap and Tugger are Old Deuteronomy's sons.
 * There is speculation among both actors and fans of the 2016 Broadway revival that there is some sort of rocky relationship between Tugger and Skimbleshanks, often one that changes every night (heated enemies, good friends, lovers...)
 * Broadway Revival names Tugger's ensemble costume as "Bill Bailey", unrelated to the kitten of that name.

Relationships

 * Alonzo: might be brothers.
 * Bombalurina: might be mates.
 * Coricopat: might be cousins or his nephew
 * Demeter: Might be friends but Demeter has little patience for Tugger's antics.
 * Etcetera: might be mates, or Etcetera's idol.
 * Exotica: might be mates.
 * Jemima: might be mates, or siblings or uncle.
 * Old Deuteronomy: confirmed in UK productions that Rum Tum Tugger is Old Deuteronomy's son.
 * Macavity: might be brothers.
 * Mistoffelees: might be related or mates. They have an unusual relationship, Misto is the only younger cat to not be impressed with Tugger's antics, yet Tugger is in awe of Misto's abilities and sings his solo. Main article: Tugstoffelees
 * Munkustrap: confirmed in UK productions that Tugger and Munkustrap are brothers.
 * Tantomile: Tantomile is attracted to Rum Tum Tugger, might be cousins or his niece
 * Victoria : might be siblings, or a fan.

Theories

 * Street Cat Tugger is a bright golden tabby.
 * Street Cat Tugger is actually Rockstar Tugger's wayward son.

Relationships

 * Demeter: might be mates, more so than Rockstar Tugger
 * Mungojerrie: close friends, very similar personalities.
 * Munkustrap: confirmed in UK productions that Tugger and Munkustrap are brothers.
 * Old Deuteronomy: confirmed in UK productions that Tugger is Old Deuteronomy's son.
 * Rumpleteazer: might be mates.

Theories

 * Rumpleteazer is a tabby and white. Possibly a Bengal cat breed.
 * She and Mungojerrie may have had connections with Macavity at some point, given their personalities and interactions with him onstage.

Relationships

 * Coricopat: might be mates.
 * Demeter: might be mates, or friends.
 * Jellylorum: might be Rumpleteazer's mother.
 * Jennyanydots: might be Rumpleteazer's mother.
 * Macavity: might be Rumpleteazer's father.
 * Mistoffelees: might be mates, or close friends.
 * Mungojerrie: might be Rumpleteazer's twin, brother, or mate.
 * Munkustrap: Some fans think they are mates.
 * Rum Tum Tugger: might be siblings, a fan, or mates.
 * Skimbleshanks: might be Rumpleteazer's father.

Theories

 * Skimbleshanks is a ginger cat, with "Glass green eyes" and a "Long brown tail".
 * Skimbleshanks is possibly a Scottish Straight cat breed, due to his accent
 * There is speculation among both actors and fans of the 2016 Broadway revival that there is some sort of rocky relationship between Skimbleshanks and Tugger, often one that changes every night (heated enemies, good friends, lovers...)

Relationships

 * Asparagus: might be brothers.
 * Bombalurina: might be Skimbleshanks' daughter.
 * Coricopat: might be his adopted son.
 * Demeter: might be Skimbleshanks' daughter.
 * Electra: might be Skimbleshank's daughter.
 * Etcetera: might be Skimbleshank's daughter.
 * Jellylorum: might be mates.
 * Jemima: might be his daughter or adopted daughter.
 * Jennyanydots: might have been lovers,siblings or his mother.
 * Mistoffelees: might be Skimbleshanks' son.
 * Pouncival: might be Skimbleshanks' son.
 * Rumpleteazer: might be Skimbleshanks' daughter.
 * Tantomile: might be his adopted daughter.
 * Tumblebrutus: might be Skimbleshanks' son.
 * Victoria: might be Skimbleshanks' daughter.

Theories

 * As the "Psychic Twins" and "Witch's cats" the twins display magical abilities. This suggests they might be related to the other magical cats - Mistoffelees, Macavity, and Jemima.
 * Tantomile and Coricopat are possibly an Abysinnian, a Burmese, or a Somali cat  breed.

Relationships

 * Cassandra: might be relatives or good friends.
 * Coricopat: Coricopat and Tantomile are the telepathic twins
 * Exotica: might be a distant relative of Tantomile.
 * George: might be mates or close friends.
 * Jemima: might be close friends or sisters.
 * Mistoffelees: might be close friends.
 * Mungojerrie: might be Tantomile's mate.
 * Old Deuteronomy: might be Tantomile's father.
 * Skimbleshanks: might have adopted her.
 * Tumblebrutus : might be mates, or close friends.

Theories

 * Victor is a dark tabby.
 * Victor is tall and appears adult, but acts like a kitten.

Relationships

 * Bill Bailey: might be brothers, or good friends.
 * George: might be brothers, or good friends.
 * Rumpleteazer: might have a crush on her.

Theories

 * Some fans think she might be a deaf/mute, because in real life, solid white cats are often deaf. She also doesn't sing.
 * Victoria is possibly a Burmilla cat breed despite that the breed consists of an all white or light color with minimum color markings or an all-white Turkish Angora.

Relationships

 * Alonzo: might be mates, siblings, or friends.
 * Asparagus: might be her father.
 * Bustopher Jones: might be her father or her uncle.
 * Demeter: might be her mother.
 * Electra: might be close friends.
 * Etcetera: might be sisters, or close friends.
 * Griddlebone: might be Victoria's mother.
 * Jellylorum: might be Victoria's mother.
 * Jemima: might be close friends, mates, or sisters.
 * Jennyanydots: might be Victoria's mother.
 * Macavity: might be Victoria's father.
 * Mistoffelees: might be mates, siblings, or close friends. Main article: Mistoria
 * Mungojerrie: might be mates.
 * Munkustrap: might be Victoria's father.
 * Pouncival: might be mates or siblings.
 * Plato: might be mates, in some productions they dance the Mating Dance together. Main article: Platoria
 * Old Deuteronomy: might be her father or grandfather.
 * Rum Tum Tugger: might be siblings, or a fan.
 * Skimbleshanks: might be Victoria's father.
 * Tumblebrutus: might be mates, or siblings.
 * Bombalurina: might be Victoria's mother.