 Before Blanche I of Navarre arrived in Sicily to be married to her father, the king sent her and her younger brother Fadrique (illegitimate son of Martin I and Tarsia Rizzari) to the Aragonese court to be reared in the care of the king's mother, Queen Maria de Luna.She was twice married.Her first husband was Enrique Pérez de Guzmán, 2nd Count de Niebla, who she married in 1405.