In 1777 Elizabeth, sister of Sir Skeffington Smyth of Tinny Park, county Wicklow, married the Comte de Jarnac, Viscount Chabot of the Rohan family of France. Their son Major General Louis William de Rohan-Chabot, Viscount Chabot married Isabell Charlotte, daughter of the 2nd Duke of Leinster, in 1809. Lady Elizabeth Mathew died in 1842 and left the Mathew, Earl of Llandaff, estates in county Tipperary to her cousin the Viscount Chabot. In the mid 19th century the Chabot estate was located mainly in the parish of Templemore, barony of Eliogarty and in the parishes of Kilfeakle and Relickmurry and Athassel, barony of Clanwilliam, county Tipperary. In June 1859 the Manor of Thurles, 1,713 acres in the barony of Eliogarty and part of the Thomastown estate containing 2,378 acres in the barony of Clanwilliam, belonging to Viscount Chabot, were advertised for sale. The sale did not include Thomastown Castle. The Viscount died in 1875.