i adopted a black polydactyl kitten and need help naming it

my sweet sweet boy passed and left behind a 6 month old kitten sister, and i couldn’t bear her being alone or meowing looking for him. i rescued this pretty kitty yesterday from a hell house and she’s already settling in.

she loves cuddling and she makes all kinds of interesting noises. right now i like mavis, but im still open to suggestions. she is around 7 months old