Westernesse is a fictional kingdom in the Middle English romance of King Horn.
It also featured in the writings of Tolkien as a translation of Númenor, a realm in Middle-earth.
The throne eventually passes to Arnoldin, who is a loyal companion of the narrative's hero, Horn.
[1] Whether or not Westernesse should be identified with one or more real-world locations remains, however, a point of dispute, since the narrative contains little geographic detail, and only vaguely echoes historical events.
[2] Many people today know "Westernesse" as J. R. R. Tolkien's translation of Númenor, the name which he gave to one of the realms in his fictional world of Middle-earth.