Question: Who is Juan De La Cerda, 6Th Duke Of Medinaceli's paternal grandfather?
Sentence (from "Juan de la Cerda, 5th Duke of Medinaceli"): Juan de la Cerda, 5th Duke of Medinaceli (1544 – 29 May 1594), Grandee of Spain, (in full), was a Spanish nobleman and Ambassador in Portugal.
Relevant evidence: No