Na'onak was a Goa'uld word which meant "no name". While trapped on Sokar's prison moon of Netu in 1999 after being brought back from the dead, Apophis took the name Na'onak while he was First Prime to Bynarr. When SG-1 visited the moon, however, Apophis killed Bynarr and revealed his true identity. (SG1: "Jolinar's Memories")