From The Stargate Omnipedia

Genii soldier, son of Athor. Idos is believed to have been killed when John Sheppard raised the shield that protected the Atlantis Stargate, also killing 54 other Genii attempting to invade and seize control of the city.


The Eye - Kolya asks regarding the status of Idos following the failed attempt to bring reinforcements to Atlantis, but Sora tells him that no man by that name came through.