Unlike their mainland cousins, the First Men of the Iron Islands never bowed to the Old Gods.
Yara: Theirs was the Drowned God, who made the ironborn to reave and sack and write their names in salt, steel and song... that his enemy - the Storm God - could not wash away. We raised our kings from our own ranks and used beaten foes as thralls to work our mines and farm our land...
Theon: Or as salt wives... if a woman was pretty enough. Such was the old way, and as we followed it they held sway wherever the waves were heard.
Yara: Other kings, like the Starks, could kneel, but Harren was ironborn and the ironborn must be beaten. In Harrenhal he had the mightiest castle in Westeros, and the army to defend it.
Theon: But Aegon did not intend a siege. He mounted hisdragon and roasted Harren and all his sons in their tower, and the old way with them.
Because of Harren's defiance, Aegon pushed the Ironborn back to our islands and gave the Riverlands to the Tullys. But he did allow the ironborn to choose who would lead them.
Yara: House Greyjoy had always been one of the greatest houses of the Iron Islands. We trace their descent from the Age of Heroes and the legendary Grey King, who took a mermaid to wife and made war upon the Storm God for a thousand years.
Theon: Blessed by the Drowned God, the Grey King fought and slew Nagga the great Sea Dragon and took her fire for his own.
Yara: This history made our ancestor, Vickon Greyjoy, the natural choice to lead the Ironborn after Aegon's Conquest.