- This branch of the Creagh family are descended from William Creagh, a brother of John Creagh of Killowen, county Cork. William Creagh of Old Town, Shanballymore, county Cork, married Sarah Nagle of Annakissy. In 1803 their son Pierce Creagh [of Rockforest Cottage] married Isabella Leeson and had a son William Creagh of Ballygarrett. William Creagh held land in the parish of Clonmeen, barony of Duhallow and Clenor and Mallow, barony of Fermoy in the early 1850s. In the 1870s William Creagh of Ballygarrett owned 1,124 acres in county Cork.