Question: Who is Ermengarde, Viscountess Of Narbonne's paternal grandfather?
Sentence (from "Aimery II of Narbonne"): He was the eldest son of Aimery I of Narbonne and Mahalt (also Mahault or Mafalda), daughter of Robert Guiscard and Sichelgaita and widow of Raymond Berengar II of Barcelona.
Relevant evidence: Yes