Spartaner is a race of Humans from Sparta whose ancestors were taken from Earth by the Goa'uld System Lord Pelops several thousand years ago. Spartans on Aegis consist of only about ten percent of the entire population.
Pelops brought also some groups Spartans to the planet Aegis and they already started to conquer and enslave the natives Aegisians. (RPG: "Living Gods: Stargate System Lords")