Hemi for Hemingway, since the kitten is a polydacht, ie more claws than normal, and Hemingway had an Island full of cats that were polydachts. Hemi hasgot 6 claws, which make him look like he has opposable thumbs

Cat 5 is named Cat 5 for no other reason than I thought 5 was a good name for a cat... Maybe he'll end up being Secret Agent Cat 5