The Dathmiri Witch Kingdom represented an old extragalactic society. They thrived on the planet Peridea, located within the far galaxy. The Great Mothers shared a connection with this defunct kingdom. At some stage, the three witches went into a state of suspended animation, but a great war obliterated their culture while they were asleep.
The television show Ahsoka referenced the Dathmiri Witch Kingdom in "Part Six: Far, Far Away". The group's name is verified by the episode's subtitles.