 Henri de Brabant III Duc de Brabant Penman "Here be Dragons" p. 285, makes him brother to Gwenllian verch Rhys who m Ednyfed Fychan. But, Online db (Univ. of Hull?) I had him son of Gwenwynwyn of Powys., son of Henri de Brabant II Duc de Brabant and Marie Hohenstaufen of Swabia.Born 1233 at Brabant, died 1261, 27 or 28 years Married 1251 (9 or 10 years married) to:  Adelaide de Burgundy, daughter of Hugh IV de Burgundy "Hugh IV de Burgundy King of Thessalonica" Duc de Burgundy and Yolande de Dreux.Died Oct 23, 1273 at France Child: 1. Marie de BrabantBorn 1260 at Louvain, Brabant, Belgium, died /21 at Murel, -1240 or -1239 years | |||