Tilgath was a Goa'uld who was among the rivals targeted by Anubis as he launched attacks against System Lords and absorbed their forces into his own. As the Goa'uld united against Anubis, Tilgath and Ramius arranged a summit to forge an alliance against their common enemy. However, a single Kull Warrior sent by Anubis infiltrated the summit, decimating the forces of both sides, and Tilgath was among the dead.
Cross Reference: Anubis, Goa'uld, Kull Warrior, Ramius
Episode Reference: Evolution