The Dúnedain (singular: Dúnadan) were the Men of Middle-earth who were descended from the Númenóreans who survived the fall of their island kingdom. They are also called the Men of the West and the Men of Westernesse (direct translations of the Elvish term). They settled mainly in Arnor and Gondor.
This name was reserved to those Númenóreans who were friendly to the Elves: the other, hostile survivors of the Downfall were known as the Black Númenóreans.