Names like Foxpaw or Blizzardstar or flipping Flowerkit aren't copyrighted. Not a cliché exactly, but still. As long as you're not taking every attribute of the character, you aren't stealing it. The suffixes are given to every cat.

* I think something somewhere prompted this story part, idk, but hell yeah. If you see a neat name from the canon series and want to steal it, go ahead. Applefrost and Smokefoot are my OCs now.