I like a lot Maltross' suggestion of adding an Egyptian reference.
I would point out however that Set doesn't seem to be associated with snakes. Plus his name might be confusing (even with the alternate spelling Seth), and the Egyptian reference lost to most.
Depending on the personality we want to give to these snake people, we may refer to the protective goddess Wadjet, or the snake god of Chaos Apep (a.k.a. Apophis).
What about "Children of Wadjet", or "Followers of Apophis"?
P.S. Of course one of them would have to wield a khopesh, then!