Wilton Castle has long and varied history and it is associated with some of County Wexford’s most esteemed families including the De Denes, Furlongs, Butlers and Alcocks. In its earliest days it was the centre of a large medieval manor that was referred to as Kayer. This manor or barony covered much of the modern parishes of Bree, Davidstown and Glynn and was referred to variously as Kayer, Keir, Kyre, and Caher.