Ryn'tak was a male Jaffa in the service of Heru'ur.
He traveled to Cimmeria with Heru'ur in an attempt to conquer the Cimmerians but was driven away by Thor. (SG1: "Thor's Chariot")
A short time later, he traveled to Abydos to find Amaunet and was killed by SG-1. (SG1: "Secrets")