Rigel IV native
Rigel IV natives were a humanoid species native to the planet Rigel IV.
One of the known cultures were the Hill People, native of the Argus River.
In 2266, Beratis, the entity otherwise known as Redjac, murdered several women on Rigel IV. The following year Redjac murdered several women on Argelius II while possessing the body of Mr. Hengist. (TOS: "Wolf in the Fold")
Sometime before 2367, an astronomer from Rigel IV named a star after Lwaxana Troi. (TNG: "Half a Life")