Born to Fëanor and Nerdanel during the Years of the Trees in Aman, he was the eldest of their seven sons (his brothers were Maglor, Celegorm, Caranthir, Curufin, and twins Amrod and Amras).
Upon learning that Celegorm’s servants had cruelly sent Dior’s twin sons, Eluréd and Elurín, to starve in a dark forest, Maedhros filled with righteous anger and pity went on a long and perilous search for them, but it proved to be fruitless.