LOOKIT!!! I got an early birthday present.

[Iowa Roo Mom]

Midnight
Blackie
Cocoa
Spot
Charcoal
Lu
Socks

...This coming from someone who has a snake named "Fluffy"

Or you could go with the standards like:
Snowball
Snowflake
Frosty
Blanco
Ghostface

 

[PineappleMama]

Ohhh on the charcoal thought... coal... cole... or even better, summon Mary Poppins and go with Sweep.

Ironic since cats typically hate brooms... unless they're hitching a ride that is.