This marriage is not referred to in Pérez de Urbel. It may be speculative in an attempt to explain the nomination of Nuño as Conde en Castilla, although it is not certain that his appointment was due to family connections. 1
Marriage Information:
Unknown married Munio NÚÑEZ "él de Castrojeriz", Conde en Castilla.
Sources
1 Foundation for Medieval Genealogy, Medlands: [daughter.].