Hathor was a godling that belonged to the House of Ra.
Many years ago, her life was threatened and so she enclosed herself in a Mastaba on a one of her secret outposts located on an unnamed moon in the Kaliam galaxy. She remained hidden to her enemies for many years to come until one day she was awakened by the loyal member of the House of Ra, Thoth, who told her that Ra had died. Hathor inmediately took Ra's place as she was his wife.(Stargate: Rebellion 1)
She, along with Thoth, arrived to the base on Tuat to take inmediate command of Ra's domain of the galaxy, but Khnum was not happy with this and tried to assasinate Hathor. Hathor used the minor godling Hapi as a shield, and than killed Khnum for his actions. (Stargate: Rebellion 2)