Edmyn Tully

Edmyn Tully is a character in Game of Thrones. He is long dead by the time depicted in the tv series. Lord Edmyn Tully was the Lord of Riverrun and a vassal of King Harren the Black, though he rebelled against him when Aegon the Conqueror invaded Westeros. After the elimination of Harren and his entire line, Edmyn Tully was rewarded with the title of Lord Paramount of the Riverlands.

In the books
In the A Song of Ice and Fire novels, Edmyn Tully's backstory is the same.