[1] William de Braose, Lord of Abergavenny, one of the most powerful barons in the Welsh Marches, had been captured in battle by Llywelyn, Prince of Gwynedd, in 1228.
[1] As the scandal reached all across Wales and the March of William’s capture "the enemies of his house hastened from every quarter to see this scone of a hated stock brought to his account," wrote Lloyd, "even had Llywelyn been in the mood to resist the tide of popular passion, he might have found it hard to withstand the demand that William should die.
"[1] On 2nd of May, at a certain manor called ‘Crokein, he was made ‘Crogyn, i.e. hanged on a tree, and this not privily or in the night time, but openly and in the broad daylight, in the presence of more than 800 men assembled to behold the piteous and melancholy spectacle.However, Llywelyn did not wish to jeopardize an otherwise shrewd political marriage, and wrote to William’s widow Eva and her brother William Marshal, 2nd Earl of Pembroke, who was now guardian to Isabella and her sisters the Braose co-heiresses, of his wish for the marriage to continue.
[1][2] Dafydd became ruler of Gwynedd and the prominent Welsh leader following Llywelyn's death in 1240, and was recognised as Prince of Wales by his uncle, King Henry III of England.
[1] However, as heiress of her mother Isabella did inherit the castle of Haverfordwest, lands in Caerleon and in Glamorgan.