Have any ideas for Harry Potter inspired names for white kittens?

Terry Boot

Albus maybe? It does mean "white". o maybe Alba would be the female form, if you're talking about a female kitten. I'd suggest Luna but tu say that name's already taken por a black kitten.

Here are some suggestions:
1. Minerva (meaning; goddess of wisdom and war)
2. Ginerva o Ginny (derived from celtic origin)
3. Bellatrix (meaning; female warrior)
4. Ariana (meaning; very holy)
5. Narcissa (meaning; daffodil)
6. Nymphandora (meaning; divinty of nature)
7. Tonks
I personally prefer the name "Minerva", minnie for short.

If I had a white kitten, I'd name it Draco Meowfoy (or Narcissa Meowfoy if it was a girl).

If I had a white kitten I would call it Snow White o Hogwarts

Hedwig. Because it's white.

Luna

Perfessor Snape

Albus, Sirius, Lavender, Parvati, Padma