ime cats nearly always have a 'kitten name' that they're referred to when tiny and usually no one has a clue about the sex and then they get a grown up name when they're bigger/rehomed to their permanent family.
So you can call tiny kittens all sorts of ridiculous names that a cat would never fit.... we've had Scruffy, Squeky, Slash, Gizmo, Whiteface, Little Black Cat and loads of other daft names.
Mom definitely needs a proper name though.