Kumumgah
From Wookieepedia, the Star Wars wiki.
The Kumumgah were a technologically advanced race that lived on Tatooine who defied the Infinite Empire. The Rakata punished this by bombarding the surface of the once lush world of Tatooine into little more than fused glass. This eventually crumbled and became desert sand. The extreme climatic change split the Kumumgah into two races: the Ghorfas (who evolved into the Sand people) and the Jawas.
[edit] Behind the scenes
It is implied in Star Wars: Knights of the Old Republic that they were the original Humans or at least related, perhaps even to the Zhell.
