Gwilym ap Tudur Rhys and Owain Glyndŵr. As a result, the Tudur brothers began planning an attack on Conway Castle. On Good Friday, 1 April 1401, the brothers and 44 men (which included those who had also been excluded from the pardons) infiltrated the castle. They had pretended to be carpenters, and captured the castle while the guard were in church. Negotiations began for the return of the castle on 13 April, with the king represented by Henry "Hotspur" Percy and Gwilym representing the Welsh forces. After seeking a compromise, which would have resulted in pardons being given to the Welshmen, the king
Owain Cyfeiliog of southern Powys (this became known as Powys Wenwynwyn after it was inherited by his son). He married Gwenllian, one of the daughters of Owain Gwynedd. He is recorded as having been in alliance with the other Welsh princes to withstand the invasion of 1165 by King Henry II of England. Thereafter he usually followed a policy of supporting the English crown. In 1170 he gave land for the founding of the abbey of Strata Marcella. In 1188, however, he refused to meet or support Baldwin, Archbishop of Canterbury and Giraldus Cambrensis when they journeyed around Wales to raise men