House Tully is the principal house in the riverlands; many lesser houses are sworn to them. Their seat is at Riverrun. They are an old line dating back to the Age of Heroes as Lords of Riverrun but were never kings. Their sigil is a silver trout leaping on a blue and red striped field, and their words are "Family, Duty, Honor."

House Tully rose to prominence during the Targaryen conquest. When Aegon the Conqueror attacked, Edmyn Tully was the first to rebel against King Harren of the Isles and support the invading Targaryen army. Afterwards, Aegon made House Tully lords paramount of the Trident.

ALLIED HOUSES: Stark, Arryn
ENEMY HOUSES: Lannister