Female: Bianca...means white
Male: Fionn(pronounced Fin) means fair, white.
dumbledore- has a lovely white beard, well cute name for a cat
Drusy is a chrystal white gemstone with glittery speckles
For a male kitten, "Gandalf" would be good, from the name of the wizard in "Lord Of The Rings", "Gandalf The White".
'Coconut', would be a sweet name for a white kitten, reminding the shredded coconut pulp
how about Alba it literally means white.
Snowball if it is a girl and Snowballs if it's a boy!
Shiro, it means white in Japanese. :)
Daisy if its a boy or a girl. I have a pure white Tom cat named Daisy everyone likes his name definately a conversation starter.
My son named his white kitten cloud.
I had a blue-eyed, white kitten who turned out to be deaf. We named her Snowflake and then ended up calling her Flaky (since she couldn't be insulted given she was deaf). True story. In Choctaw Indian language, the word for white is Tohbi (like Toby), so that would be a cute name, as well.