Lady Eva was the 8th child of William Marshal. Eva and her sisters were described as being handsome, high-spirited girls. From 1207 to 1212, Eva and her family lived in Ireland. Her paternal grandparents were John Marshal and Sibyl of Salisbury, and her maternal grandparents were Richard de Clare, 2nd Earl of Pembroke, known to history as Strongbow and Aoife of Leinster, for whom she was probably named. Sometime before 1221, she married Marcher lord William de Braose, who in June 1228 succeeded to the lordship of Abergavenny, and by whom she had four daughters. William was the son of Reginald de Braose and his first wife Grecia Briwere. He was much hated by the Welsh who called him Gwilym Ddu or Black William. , Wales, the birthplace of Eva Marshal
Eva's husband was publicly hanged by Llywelyn the Great, Prince of Wales on 2 May 1230 after being discovered in the Prince's bedchamber together with his wife Joan, Lady of Wales. Several months later, Eva's eldest daughter Isabella married the Prince's son, Dafydd ap Llywelyn, as their marriage contract had been signed prior to William de Braose's death. Prince Llywelyn wrote to Eva shortly after the execution, offering his apologies, explaining that he had been forced to order the hanging due to the insistence by the Welsh lords. He concluded his letter by adding that he hoped the execution would not affect their business dealings. Following her husband's execution, Eva held de Braose lands and castles in her own right. She is listed as holder of Totnes in 1230, which she held until her death. It is recorded on the Close Rolls that Eva was granted 12 marks by King Henry III of England to strengthen Hay Castle. She had gained custody of Hay as part of her dower. In early 1234, Eva was caught up in her brother Richard's rebellion against King Henry and possibly acted as one of the arbitrators between the King and her mutinous brothers following Richard's murder in Ireland. This is evidenced by the safe conduct she received in May 1234, thus enabling her to speak with the King. By the end of that month, she had a writ from King Henry granting her seisen of castles and lands he had confiscated from her following her brother's revolt. Eva also received a formal statement from the King declaring that she was back in "his good graces again". She died in 1246 at the age of forty-three.
