Ordoño IV of León

Ordoño IV (c. 926–c. 963), called the Bad, was the son of Alfonso IV of León and Onneca Sánchez of Pamplona. In 958 nobles weary of the obese Sancho I rebelled and placed Ordoño on the throne with the backing of his father-in-law, Count Fernán González of Castile.

In 960 a Navarrese and Córdoban alliance restored Sancho, and Ordoño fled, abandoning his wife at Burgos and losing Fernán's support. He sought aid at the caliph's court in Córdoba, but died in exile around 963, still dethroned.