Niktos, they were called when they first appeared in Return of the Jedi. Later, they had their history fleshed out and they became known as Kajain'sa'Nikto of the planet Kintan. They were Jabba the Hutt's skiff guards. In The Phantom Menace, we had pit crew Niktos and there was even a Nikto Jedi in the arena battle on Geonosis.