His father was William de Braose, eldest son of William de Braose, 4th Lord of Bramber and Maud de Saint Valery, and his mother was Maud de Clare, (born 1175 in Lincoln) daughter of Richard de Clare, 3rd Earl of Hertford of Tonbridge Castle in Kent.
John re-established the senior branch of the de Braose dynasty. She was imprisoned, along with John"s father William, in Corfe Castle and walled alive inside the dungeon. This was probably due to John"s grandfather"s conflict with the monarch, open rebellion and subsequent alliance with Llewelyn the Great.
John"s nickname Tadody means "fatherless" in the Welsh.
They were imprisoned until after King John had died (in 1216), the throne passing to Henry III. John was released from custody in 1218. Sometime in the 1220s, he established the deer park, Parc le Breos in the Gower Peninsula.
In 1232 John was killed in a fall from his horse on his land in Bramber, Sussex at 34 years of age. His widow soon remarried to Walter III de Clifford.
John the younger son became Lord of the manor of Corsham in Wiltshire and also later Lord of Glasbury on Wye.
William de Braose (1230–1291) also had a son named William de Braose who died "shortly before 1st May 1326". Another William de Braose who became Bishop of Llandaff cannot be placed with certainty in this branch of the family. The de Braose name modified to de Brewes in the Middle Ages 1200 to 1400.
