Matilda de Braose was the 2nd wife of Rhys Mechyll, son of Rhys Gryg and grandson of the Lord Rhys, Prince of Deheubarth.[1]
Her parents were Reginald de Braose, Lord of Brecon and Abergavenny (c.1182-1228) and his wife Gwladus (Also known as "Gwladus the Dark Eye") Ddu (Daughter of Gwladus Ferch Llywelyn) (c.1189-1251)
Rhys Mechyll died in 1244 and some time after this Matilda placed the castle of Carreg Cennen in the hands of the Normans.[2]
A Welsh chronicle, the Brut y Tywysogyon, records under the year 1248: "Rhys Fychan ap Rhys Mechyll regained the castle of Carreg Cennen, which his mother had treacherously placed in the power of the French, out of enmity for her son."