Magor was Malach's son, and he led a part of the Men of East Beleriand away from Hithlum and down the Sirion. They settled among the southern foothills of the Ered Wethrin, the mountains that formed the southern wall of Hithlum.

Magor's son was Hathol, and his grandson, Hador, from whom their House was named.
Encyclopedia entry originally written by Nienna-of-the-Valar