Rodrigo is first mentioned in June 1085, when he and his sister Jimena made a pious donation to Santa María del Puerto.
[2] He married a woman named Teresa sometime before March 1103, when they completed an exchange of properties (their land at Oreña for an estate in the Toranzo valley) with the monastery of Santillana del Mar.
[3] Rodrigo's daughter, called Mayor or Guntroda, married Pedro Fróilaz de Traba, a powerful Galician magnate, sometime before May 1105.
[7] On 11 August 1111, in a donation of Urraca to Santillana del Mar, he was cited as "Count Don Rodrigo of Asturias".
One charter referring to comite Rodericus Munioz totius Asturiensis (count Rodrigo Muñoz of all Asturias) is misdated to 1082.