Ernest Hemingway would only name his cats names with an "s" or "z" sound in them so that they would respond to their names easier. At one time he had 57 cats living with him in Cuba. If he didn't know then noone would.
We have three, all rescued, named Alex, Angus and Chip. In my experience the cats respond to the tone of voice rather than the words. They will come when they're called Tubby Butt, Saggy , or Stinky as often as their proper names, as long as I start the can opener!:lol:
Given the fact that he is rescued, I'd call him Lucky, although it doesn't follow the Hemingway rule.
Tink