Some people think that the members of Rayman's species could be a creation of the nymphs, just like Rayman.
Well, I had a weird theory about it.
Imagine: When the nymphs created Rayman, they saw his incredible immaturity and thought they maybe screwed up their ritual. So they began a kind of magic test, and tried to create a better hero with other Lums. And by doing so, they gave birth to Tarayzan, the Musican, Rayomz...
But then, it turned out that Rayman was really the expected hero, as he defeated the Nightmares of Polokus. So the nymphs let their new creations go, and each one chose a different way of life (Ales entered the school of magic, Raymolk went to the jungle...)