Darby O'Grady, a younger brother of the 1st Viscount Guillamore, held land in the parishes of Ballingarry, barony of Connello Lower and Grean, barony of Coonagh, county Limerick in the early 1850s, while his son Standish D. O'Grady held land in the parishes of Askeaton, barony of Connello Lower and Kilbradan, barony of Shanid. At the time of Griffith's Valuation, the representatives of Carew O'Grady held townlands in the parishes of Carrigaline and Templebreedy, barony of Kerrycurrihy, county Cork. Ó Murchadha writes that this part of the estate was purchased by Carew O'Grady in 1824 from the estate of Lord Harberton. Standish Darby O'Grady of Aghamarta Castle owned 869 acres in county Cork and 1,111 acres in county Limerick in the 1870s. He died in 1886 leaving three daughters as his heirs.