Question: Who is Juan De La Cerda, 6Th Duke Of Medinaceli's paternal grandfather?
Sentence (from "Juan de la Cerda, 6th Duke of Medinaceli"): He was born in Cogolludo, province of Guadalajara, the son of Don Juan de la Cerda, 5th Duke of Medinaceli, by first wife Donna Isabella d’Aragona, daughter of Don Antonio d’Aragona, 2nd Duke of Montalto.
Relevant evidence: Yes