Question: Who is Sancho Alfonso, 1St Count Of Alburquerque's paternal grandmother?
Sentence (from "Sancho Alfonso, 1st Count of Alburquerque"): He also had an illegitimate daughter, Leonor Sánchez de Castilla, who married Fadrique de Castilla y Ponce de Leon, illegitimate son of Henry II, King of Castile.
Relevant evidence: No