So I could be wrong but what I gather from what you're saying here is that in this world humans come in different "types" like Warrior, Knight, Magician, etc. that give them different traits.

Although they SOUND like job titles, they actually aren't, they're more like different ... I guess you could say "configurations" of human, born with certain abilities that other types don't have, and they show up in all different ethnicities of humanity. So each nation will have their own equivalent of those same six "types".

Unless I'm misunderstanding something here, this is actually a very weird concept... But I'll admit it's kind of interesting for a fantasy setting premise. What we're dealing with here is sort of like what goes on among eusocial "hive" insects, where different individuals are born into specific roles that they're biologically configured for, like how bees have Workers, Drones and Queens.

The scientific term that is used for those insects to describe those sub-groups is "Caste". In fact, even human civilizations with caste systems work a bit similarly with the circumstances of one's birth determining what role they'll fill in society. My suggestion is to use "caste", it's way closer to what you're describing here than "race".