This is designed for clans that might exist anywhere, not just the original 5. A note, I stopped reading Warriors halfway through Power of Three. These suffixes are not 100% traditionalist, but I do try to have some logical meaning to things. That is the prefix points to a cat's appearance or circumstances surrounding their birth, and a suffix either speaks to their skills, personality, history or enhances the prefix.
They're gendered because that's important to some people, you don't HAVE to use the gendering, but it's there for people who want it. The only exception is for anything connected to calicos/tortisheshells because of the genetic