Mac Giolla Eóin
Mac GIOLLA EÓIN—IV—M'Ellowen, Magloan, Magloin, Maglone, Malone, MacAloon, MacAloone, MacClune, MacLoone, MacLune, Gilloon, Gloon, and, by 'translation' Monday, Munday; 'son of Giolla Eóin' (servant of St. John); a scattered Ulster surname, found chiefly in Donegal and Tyrone. The popular pronunciation was often Mac Giolla lúin, which caused the last syllable to be mistaken for Luain, Monday; hence the 'translated' forms Monday, Munday. See Mac Giolla Eáin.
Alphabetical Index to Irish Surnames