Avidan was a saying in the ancient Goa'uld dialect, meaning "The Gods are just". The Tegalans referred to their Stargate as the "Ring of Avidan". After Soren succeeded in his coup d'etat on Tegalus, he renamed the Rand Protectorate to Avidan, until his death. This may also mean that Soren's religious faction was called Avidan. (SG1: "Icon")