Board Thread:Suggestions forum/@comment-26296200-20160123014258/@comment-26172435-20160123091525

Umbarians were indigenous to the land of Umbar. Black Numenoreans were numernoreans that ruled Umbar for long, but chose to side with the dark side after the demise of Numenor. Corsairs were rebellious / renegade Gondorians that rejected the rule of Gondor in those days. It led to the separation of Umbar and surrounding southern Gondorian territories from Gondor.

The constitution of the peoples of Umbar will have been mainly Haradrim in the late 3rd age, with Corsairs and some remnants of Umbarians making up the rest. Of black Numenoreans only few may have been left after the many decades of turmoil and intermigling with Umbarians, Gondorians, Corsairs and Haradrim.