My friend has a rat named Kirby and I think that's pretty cute name! But name them for their character/looks. My aunt had a rat when she was in fifth grade that she found on the subway and took home (And twenty years later she became a vet/animal scientist). Anyway, she named him Punkrr because he was a tough little guy from the streets. But my friend (same one who has Kirby) has a delicate, tiny little girl named Mimi (or is it snowflake?....). But anyway, it isnt an lady decision, so think about it!