Corsairs of Umbar
After the Downfall of Númenor, the Umbar settlers further descended into evil, and were called the Black Númenoreans. They took to pillaging and piracy along the coasts of Gondor. During the Kin-strife, the defeated rebels of Gondor fled to Umbar — by this time Umbar became the hated enemy of Gondor.
By the time of the War of the Ring, the Corsairs had mixed with the Haradrim, becoming a mixed people where Númenórean blood was mostly gone. During the Battle of the Pelennor Fields, a fleet of Corsairs was raiding Lebennin when Aragorn captured their ships and rowed them to Minas Tirith to relieve the siege of the city.