I love your answers.
my Beast, so called because I called him that beastly cat when he climbed my net curtains (new) regularly. He wasn't the least beast like he would hang round my neck like a feather boa whilst I did house work! I eventually took down the nets and threw them away....
Puff, so called because when a kitten he had two little round objects under his tail!!!! they were black, but each hair was tipped white and my husband said they looked like two little powder puffs......
Oidygoidy named for my 3yr old daughter calling Early Girl as she heard the name. originally Early girl because she always came early for food, some times she would sit at her place mat for an hour before dinner time and I would tell her she was an early girl