 His vast domains were divided amongst his sons at his death, giving rise to three independent medieval kingdoms each ruled by a Jiménez monarch.The Kingdom of Navarre, passing to the eldest son García, was unable to maintain its hegemony, leading to the full independence of Aragon under his illegitimate brother Ramiro I, who had previously taken over the territories of murdered brother Gonzalo of Sobrarbe and Ribagorza.Younger sibling Ferdinand I, then Count of Castile, killed in battle his nominal overlord the King of León and Galicia in 1037 and thereby inheriting them and bringing them fully into the orbit of his ruling clan.