Board Thread:Suggestions forum/@comment-31382381-20170225024029/@comment-31907131-20170225032203

There is no discussion about them because the majority of them are dead. Their descendants if they had any are probably lesser men in the South, far from the power of Gil-galad of old, or wraiths in the service of Sauron, like the Lieutenant of Barad-dur, but those were few indeed, the Mouth being the only one mentioned aside from three of the Nazgul.

The triumph of the Last Alliance marked the decline of the Black Númenórean race and the end of their racial superiority. They dwindled swiftly or became merged with the Middle Men.

~Tolkien Gateway