Bermudo III or Vermudo III was the king of León from 1028 until his death. He was a son of Alfonso V of León by his first wife Elvira Menéndez, and was the last scion of Peter of Cantabria to rule in the Leonese kingdom. Wikipedia
Born: 1015
Died: September 4, 1037 (age 22 years), Tamarón, Spain
Parents: Alfonso V of León and Elvira Menéndez
Siblings: Sancha of León
Children: Alfonso
Spouse: Jimena of Castile (m. 1035) and Jimena Sánchez di Navarra