B. c.1160, s. of Gruffydd Maelor and Angharad; acc. 1191; m. Isota; issue: Gruffydd Maelor, Gruffydd Ial, Maredudd, Hywel, Madog Fychan, Angharad; d. 1236; bur. Valle Crucis.
From 1191 Madog shared northern Powys with his brother Owain, and on his death in 1197 became sole ruler. His limited resources dictated a balancing act. At first he allied with Llywelyn ab Iorwerth, then opposed him 1211–15, but rejoined him in 1215. He founded in 1201 the Cistercian house of Valle Crucis, where he was buried.
Subjects: Maritime History — British History.