Third Marshal of the Riddermark
Éomer
Éomer son of Éomund, nephew and foster-son of Théoden, was Third Marshal of the Mark when he met Aragorn on the plains of Rohan and lent him horses against the king's orders. He fought at the Hornburg and the Pelennor, took the kingship when Théoden fell, and reigned for sixty-five years as the eighteenth King of Rohan, the friend of King Elessar and the renewer of the Oath of Eorl.