The MacCormac family descends from the union of John MacCormac, (d. 1811), a prosperous linen merchant and Mary Ann Hall, (1766-1846), a wealthy heiress and daughter of Colonel Joseph Hall, a notable distiller in County Armagh.
The origins of the Hall family are probably in England or Scotland, although the name may be an anglicised version of a traditionally Irish surname.
The descendants of Henry MacCormac and Mary Newsam MacCormac include several medical doctors and other descendants who distinguished themselves in education, commerce, and the civil service during the nineteenth and early twentieth centuries.
He lived in the Gold Coast and Sierra Leone for over fifty years.
Members of the Easmon family, a West African medical dynasty that partially descends from John MacCormac, (1794-1865), include: