Rodrigo Muñoz de Guzmán
Rodrigo Muñoz de Guzmán or Rodrigo Núñez de Guzmán (died "" 1186), considered the common ancestor of the noble house of Guzmán, was a Castilian magnate and "tenente" of Roa and of the village of Guzmán in Burgos, from which this lineage took its name. Life. Nothing is known about the parentage or ancestry of Rodrigo Muñoz de Guzmán. The onomastic customs of that time dictate that, given his patronymic Muñoz, he must have been the son of a Munio (Muño) or Nuño. He was a patron of several monasteries, including the Monastery of San Cosme and  San Damián in Covarrubias and of the Monastery of San Cristóbal de Ibeas situated in San Millán de Juarros which had been founded by Álvaro Díaz de Oca and his wife Teresa Ordóñez, the maternal grandparents of his wife Mayor. Rodrigo and Mayor were buried there. On 20 February 1151, Gutierre Fernández de Castro with his wife Toda, and Rodrigo and his wife Mayor, Toda's sister, donated several properties that the sisters had inherited from their maternal grandparents, to the abbot of the monastery. Rodrigo Muñoz probably died shortly after 29 January 1186, the date when he last appears  in medieval charters. Marriage and issue. He married before 1150 Mayor Díaz, daughter of Diego Sánchez, who died in the Battle of Uclés, and of Enderquina Álvarez, daughter of Álvaro Díaz de Oca and his wife Teresa Ordóñez. At least nine children were born of this marriage: