Question: When did Maria Of Aragon, Lady Of Cameros's husband die?
Sentence (from "Peter of Castile, Lord of Cameros"): He held the lordships ("señoríos") of Cameros, Almazán, Berlanga, Monteagudo and Cifuentes and was the "mayordomo" of his brother, King Ferdinand IV of Castile.
Relevant evidence: No