Question: Who is the father-in-law of Mafalda Of Portugal (Born 1153)?
Sentence (from "Mafalda of Portugal (born 1153)"): This did not compromise the establishment of long-lived good relations between Portugal and Aragon, since Mafalda's younger brother Infante Sancho (future Sancho I of Portugal) would marry Dulce Infanta of Aragon, sister of Alfonso II in 1174.
Relevant evidence: No