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King of the Isles and the North
A Clash of Kings
Rejecting the authority of the Iron Throne, Lord Balon Greyjoy declares himself King of the Iron Islands. Since Robb Stark, the King in the North, is fighting south of the Neck, the ironborn invade the North during the War of the Five Kings. Balon claims the region by right of conquest and styles himself King of the Isles and the North.
A Storm of Swords
A Feast for Crows
Most of the ironborn withdraw from the North to attend a kingsmoot on Old Wyk to choose Balon's successor. His brother Euron Greyjoy is chosen after announcing he intends to conquer all of Westeros.
A Dance with Dragons
Euron styles himself King of the Isles and the North, although the northmen recover Deepwood Motte and Moat Cailin and the ironborn control only Torrhen's Square in the North. He has not altered his title, so far, despite having conquered the Shield Islands in the Sunset Sea.