House Sunderland of the Three Sisters
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House Sunderland rules the Three Sisters from Sisterton, a scatter of islands in the Bite that owe fealty to House Arryn of the Vale. Its lords have a habit of taking sides in the realm's great quarrels and in the Vale's own disputes, and that habit has shaped their history more than the size of their lands.
Their arms show three women's heads on a wavy blue-and-green field, and their lords style themselves Kings and Lords of the Three Sisters.
Dance of the Dragons
Support for Rhaenyra
When the Dance of the Dragons broke out, the lord of Sisterton sided with Princess Rhaenyra Targaryen in her claim to the Iron Throne, throwing the Three Sisters in with the black faction.
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Vale War
Vale Succession War
Years later, Lady Jeyne Arryn died without a clear heir and someone murdered the regent Ser Corwyn Corbray; the Vale fell into a war of succession, and from their islands the Sunderlands backed Ser Arnold Arryn and House Royce.
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Blackfyre Rebellion
Later, the lord of the Three Sisters again staked his standing on the crown's favor, backing Daemon Blackfyre in his rebellion against the throne. He was also present at the Tourney at Whitewalls, where support for the Blackfyre cause was quietly building.
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Domain
Seat
Sisterton · The Vale
Sworn to: House Arryn of the Eyrie
