On 17 September 1111, Munio participated in the coronation of a young Alfonso VII in opposition to his mother, Urraca, at Santiago de Compostela.
[3] Between May 1112 and November 1116 Munio governed the Galician tenencia of Monterroso, a region south of Lugo, west of the river Miño, and along the Way of Saint James.
[4] By the summer of 1114 he made peace with Queen Urraca, which keeps with the description of him provided by the Historia compostellana that he tried to steer a moderate course.
Munio was among those nobles forced in 1114 to swear an oath to "honour" Diego as part of the archbishop's reconciliation with the queen.
In December 1147, possibly after Muño's death, Lupa, calling herself Deo devota (devoted to God), made a donation to the Cistercian monks of Monfero Abbey on the condition that they would say a mass for her soul and her husband's annually on 30 September, the day after Michaelmas.
In April that year she had purchased a piece of land at San Cristóbal de Dormeá, where, on 1 October 1152, she founded a monastery.