Question:  Ælfwine Haroldsson, most probably an illegitimate son of King Harold Harefoot of England, and most likely left in his otherwise unknown mother's or grandmother's care, was the first wife of what king?
Sentence (from "Ælfgifu of Northampton"): Ælfgifu of Northampton ( 990 – after 1036) was the first wife of King Cnut of England and Denmark, and mother of King Harold I of England (1035–40).
Relevant evidence: Yes