The House of Aberffraw was a royal dynasty in medieval Wales, specifically associated with the region of Gwynedd. It emerged in the 11th century and played a significant role in the struggle for Welsh independence against English rule. The house is named after Aberffraw, a village on the island of Anglesey, which served as the royal seat. The most notable figure from the House of Aberffraw is Llywelyn the Great, who united various Welsh principalities in the early 13th century. The house's influence waned after the conquest of Wales by Edward I of England in 1282, leading to the eventual decline of Welsh sovereignty.