The Lord of the Rings: Shadow of the East
The term Dúnedain refers to the Númenóreans and their descendants in Middle-earth, groups which possess considerable physical and mental strength, longevity, and a rich Elven-influenced culture. Adûnaic is their native language.
These High Men are descendants of the Edain who settled on the island kingdom of Númenor during the Second Age. It was their Númenórean forefathers who colonized and conqeured much of Middle-earth. When the Isle of the West sank into the sea during the Downfall of S.A. 3319, two groups survived: the Black Númenóreans and the faithful Dúnedain. The latter settled Arnor and Gondor, the Realms in Exile. Like all their brethren, they have traces of Elven and (even a little) Maia blood.
Although sparsely populated, Arthedain (in Arnor) contains the highest proportion of the Faithful and the most purely Dúnedain culture in all of Endor. Many “unfaithful” (or “Black Númenórean”) groups survive as well, living in colonies and independent states such as Umbar.