Melaghlin O'Donnell
Melaghlin O'Donnell (Irish: Maol Seachlainn Ó Domhnaill) was king of Tyrconnell and a member of the O'Donnell dynasty. He was a son of Donall Mor O'Donnell (Domhnall Mór Ó Domhnaill), king of Tyrconnell (died 1241), a man who was married to Lassarina (Lasairfhíona), daughter of Cathal Crobhdhearg Ó Conchobhair, King of Connacht. Melaghlin had two brothers: Goffraid (died 1257) and Donall Og (died 1281). Melaghlin died in 1247.