The seventh Ruling Steward of Gondor, who inherited the Stewardship from his father Túrin I, and in due course was succeeded by his son Barahir. It was the fashion at this period of history for Gondor'sStewards to take their names from historical figures of the First Age, a fashion that would survive for four generations after Hador to his great-great-grandson StewardBoromir. Hador himself was named for the great hero Hador Lórindol, ancient Lord of Dor-lómin.
Little of note occurred during Hador's rule. On the three hundredth anniversary of the Stewards' Reckoning, the calendar introduced by his ancestor Mardil, he added an extra day to the year to 'fine-tune' the calendar's accuracy. Hador ruled during the time of the Watchful Peace, and so had no need to concern himself with matters of war, though his descendants would not be so fortunate.
Hador ruled Gondor for one hundred and seventeen years (an exceptionally long rule - Hador was the last of the Gondorian rulers to live for more than a hundred and fifty years until the time of Aragorn). He was succeeded by his son Barahir.
Notes
1
The date of Hador's birth appears only in The History of Middle-earth volume XII, The Peoples of Middle-earth. It cannot therefore be considered completely reliable.