Julius
From The Stargate Omnipedia
Fossilized Goa'uld recovered in SG-11's excavation of planet P3X-888, world believed to be the origin of all Goa'uld. This Goa'uld was likely named by Dr. Robert Rothman.
KEY EPISODE
The First Ones - SG-11 unearths several Goa'uld fossils, including Julius.