Question: Who is Mendo Nunes's paternal grandfather?
Sentence (from "Nuno Alvites"): He ruled the county with his spouse Ilduara Mendes, daughter of earlier count Menendo González, until he was assassinated in 1028, the same year as the death of King Alfonso V. Ilduara continued to rule the county, with her son Mendo, who was still a child, as regent after her husband's death.
Relevant evidence: No