I have three bandicoons: Bacon, Ham and Porkchop
Mongooses: Rikki, Tikki and Tavi (after the mongoose in the jungle book)
Feral Vermling: Sweetums (kinda looks like sweetums?)
Nightsaber Cub (Simon), Cornish Rex Cat (Odie), Cinder Kitten (Vidi) all because they remind me of my real cats.
Purple Puffer: Fish Stick
Clockwork Gnome: Gerard... he looks like a proper english gentleman

so, what clever names have you come up with?