Ordoño III of León

Ordoño III (c. 926–956), eldest son of Ramiro II, succeeded his father as king of León in 951. He sought to continue his father's work of fortifying royal authority against the separatist Castilian count Fernán González.

His throne was disputed by his half-brother Sancho the Fat, backed by Navarre and Fernán, and he also faced rebellions and Muslim attacks. In 955 he raided as far as Lisbon, forcing the caliph Abd al-Rahman III to conclude a peace treaty.

He married Fernán's daughter Urraca and later repudiated her. Ordoño died at Zamora in 956, leaving a son, the future king Bermudo II.