"Family, Duty, Honor"
The principal house of the Riverlands, the Tullys of Riverrun rose to power during the Targaryen conquest. When the invaders attacked Edmyn Tully rebelled against the King of the isles, Harren the Black, and sided with Aegon Targaryen. Harren's other supporters soon followed suit, paving the way for the new king.
Sigil: Silver Trout