In 1375, the castle was granted to James Butler, newly created Earl of Ormond, for his loyalty to Edward III. His son James, the second Earl (by his second marriage) passed the lands around the barony of Iffa and Offa West to his children, though they were not themselves noble. This changed by 1542 when the first of the Barons Cahir was created. Unlike their staunchly Anglican kinsmen, this branch of the Butler dynasty sided with the Roman Catholic Irish in the Elizabethan wars. In 1599 the castle was captured after a three-day siege by the army of the Earl of Essex and was for a year put under the charge of Sir Charles Blount. Lord Cahir joined with the Earl of Tyrone in 1601 and was attainted for treason, but later obtained a full pardon. In 1627 the Castle was the scene of a celebrated