Helm Hammerhand was the ninth of the Kings of the Mark. The stronghold of Helms Deep is named after him for his long stand there against the Dunlendings during the Long Winter. Helm was succeeded by his sister-son, Fréaláf after his death.

For more detailed information about Helm Hammerhand please see the Middle-earth article by the same name.
Encyclopedia entry originally written by Nienna-of-the-Valar