Question: Why did Rhun Hir Ap Maelgwn's father die?
Sentence (from "Maelgwn Gwynedd"): Nonetheless, his principal legacy today is the scathing account of his behavior recorded in "De excidio et conquestu Britanniae" by Gildas, who considered Maelgwn a usurper and reprobate.
Relevant evidence: No