The cartoon cat Tom has the full name Thomas Jasper Cat, Sr.

MGM production notes and character guides from the 1940s include the name Thomas Jasper Cat, Sr. This information is documented in The Encyclopedia of Animated Cartoons by Jeff Lenburg. The name appears on a letter in the 1944 short film The Million Dollar Cat. This was the first time the name was shown to the audience.Character model sheets kept at the Margaret Herrick Library in California also show this name. These sheets helped animators keep the character's look and details consistent. Licensed products from the 1950s used the full name as well. A 1955 coloring book by Whitman Publishing printed the name on its inside cover.Giving cartoon characters long names was a common practice during that time. It helped creators build a more detailed history for their characters. Jerry the mouse also has a full name in these records. His official name is Gerald Jinx Mouse.