Depends on your first cat's name too, but I personally like to give egyptian gods name! It's kind of a way to feel like I'm "worshipping" my cat like the Egyptian used too lol.
Some idea :
-Bastet (Goddess who is represented with cat head)
-Anubis (I would find it funny because it's a god represented with a dog face haha)
-Hapi (Egyptian Nile God, ......
