Maude (or Mathilde) de Clare; m. William de Braose, b. perhaps c 1175, died Corfe or Windsor Castle, 1210, of starvation by order of King John, son of William de Braose, d. 1211, Lord of Bramber, Sussex, by his wife Maud de St. Valery. [Magna Charta Sureties line 28a-2]
Note: MCS line 54-1 refers to Maud de Clare m. Roger de Lacy, without giving Maud's parents. The above (which indicates her parents in the prior generation 28a-1) references her m. William de Braose. I assume that the two Maud(e)s are the same person; but MCS doesn't say.