 During the Commonwealth period in the mid 17th century the head of the Coppingerstown Cotters was William, son of Edmond, whose principal residence was Coppingerstown Castle.He forfeited his lands, possibly including land in Imokilly, Ballinsperrig and Scarth MacCotter (Scartmacotters), under attainder as a result of his taking part in the Irish War of 1641 (or Irish Rebellion of 1641) on the side of the Catholic-dominated Confederation of Kilkenny.William is recorded in the list of "Forfeiting Proprietors in Ireland, under the Cromwellian Settlement."