Magor was the son of Malach Aradan, and the third leader of the House of Marach. Though he had no special dislike of the elvenfolk, Magor was a strong-minded, independent man who wished to prove his people could succeed on their own merit without the aid of the elves, and thus he served no elf-lord and chose to move his people away from the shadow of Hithlum and downriver to the sources of the river Teiglin. His wife Amathal was assertive and bold, and though they truly loved one another they were often in conflict over logistical matters.
Amathal bore Magor only one child, a son named Hathol. Like his mother he was a warrior who had little patience when his orders were not followed, and after he inherited the leadership of his people they were quick to learn he was not a man to be crossed. Tempering his harsh personality was his wife Thevril the carpenter, a gentle woman who smoothed over any ruffled feathers by giving gifts of her own craftsmanship to those Hathol offended in the name of them both. Thevril suffered two stillbirths before her only son was born, and in loving little Hador she was more intense than even Hathol at his most egregious could dream to be.