Longfield (Castlemary & Longueville)
- John Longfield, of Castle Mary, near Cloyne, county Cork married Mary Hawnby of Mallow, county Cork. Their grandson, Richard Longfield, was created Viscount Longueville in 1800 but died without heirs and his estates were inherited by his cousin, Mountifort Longfield, who was among the principal lessors in the parishes of Skull, barony of West Carbery, Desertserges, barony of East Carbery and Ballintemple, Cloyne, Inch, Kilmahon, Middleton, Rostellan, barony of Imokilly, at the time of Griffith's Valuation. Some of his Imokilly estate was held from the Earls of Inchiquin and some from the Bishop of Cork, Cloyne and Ross. Mountifort was the son of John Longfield of Longueville and Susannah Westropp of Kilkerin, county Clare. His descendants continued to reside at Castle Mary until the early 20th century. Mountifort's older brother, John, lived at Longueville. He married Elizabeth Foster and had five sons. The senior line of his descendants now live in South Africa. The Longfield's county Cork estate in the barony of Duhallow was mainly in the parishes of Kilmeen and Ballyclogh but also in the parishes of Drumtarriff, Knocktemple and Mallow, while the county Limerick estate was in the parishes of Croom, barony of Pubblebrien and Cloncagh, barony of Connello Upper. In the 1870s, the representatives of M. Longfield of Castlemary, Cloyne, owned over 10,800 acres in county Cork while the Longfields of Longueville owned 9,410 acres in county Cork and 1,881 acres in county Limerick. Two sons of Henry Longfield, fifth son of John and Elizabeth of Longueville, also owned substantial estates in the 1870s. They were Major John Powell Longfield of Seafield, Queenstown, who owned 2,560 acres and the representatives of his brother Henry of Sea Court, Courtmasherry who owned 2,810 acres. The representatives of Henry Longfield held land in the parishes of Aghabulloge and Donaghmore, barony of East Muskerry at the time of Griffith's Valuation and Robert Longfield held land in the parish of Ballynoe, barony of Kinnatalloon.