Planet of origin: P3X-888
The Unas are a race of large and primitive reptilian humanoids that live on P3X-888, the same planet as the sentient Goa'uld parasites. Unas are an exceptionally tough and hardy species, and significantly stronger than human beings.
Source: Stargate SG-1 “Thor’s Hammer”, “The First Ones”, “Beast of Burden”
Note: Unas bear strong ressemblance to another reptilian species the Green Chasch.