Calvagh O’Donnell

Calvagh O’Donnell (died October 26?, 1566, near Derry, County Londonderry, Ireland) was an Irish lord of Tyrconnell, foe and captive of the celebrated Shane O’Neill. The son of Manus O’Donnell, Calvagh quarreled with his father and his half-brother Hugh and sought aid in Scotland from the MacDonnells, who assisted him in deposing Manus and securing the lordship of Tyrconnell for himself. Hugh then appealed to Shane O’Neill, who invaded Tyrconnell at the head of a...