Gamling
From Tolkien Gateway
Gamling (late Third Age) was a man of Rohan and the leader of the watchers of Helm's Dike. An old man during the War of the Ring, Gamling was still a commanding presence at the time of the Battle of the Hornburg. During the battle Gamling was the first to realize that Orcs had penetrated the Deep through its culvert, and he led the counterattack himself.
Gamling seems to have been brought up in the western valleys of Rohan; he understood the tongue of Dunland that was still spoken in those regions.