Jarren was the lo'taur of the System Lord Yu. When the System Lords decided to meet at the Hasara space station, Dr. Daniel Jackson used the Reol chemical to impersonate Jarren after zatting him. (SG1: "Summit", "Last Stand")
The name "Jarren" bears a similarity to Chinese words "jia" and "ren", meaning "family person" or "someone from family". It is unknown if this similarity was intentional.