[Irene Adler]

My sister had a mostly white, very bad tempered girl kitty she named Hitler due to her crooked Hitler-style black mustache marking below her nose. Hitler lived many years and regularly terrorized my sister’s other cats.

[rlmorel]

Cats like that are called "Kitlers".

There is a whole website devoted to them at:

Kitlers.

Can you believe it??? Just goes to show there is something for everyone...