Typhon
From The Stargate Omnipedia
Typhon
A guise of the Goa'uld Seth following his forces' defeat in ancient Egypt, Typhon later appeared in Greece. This god was also represented by a likely fictitious animal. One of Typhon's last legends stated that he killed three hundred of his followers and fled Greece.
DETAILS
PLAYED BY - N/A
FIRST APPEARED - N/A
KEY EPISODE
Seth - Daniel traces Seth's movements throughout history, finding a reference to a Greek god with similar back stories -- likely the missing link -- to Seth.