Question: The queen of Castile, Joanna of Castile, married this member of the house of Habsburg who was the son of which monarch?
Sentence (from "Philip I of Castile"): He never inherited his father's territories or became Holy Roman Emperor because he predeceased his father, but his son Emperor Charles V eventually united the Habsburg, Burgundian, Castilian, and Aragonese inheritances.
Relevant evidence: No