Ó Maolcholm
Ó MAOLCHOLM, Ó MAOLCHOLUIM—I—O Molcalm, O Molchalum, Malcolm, Mulholm, Mulhollum, Maholm, Mahollum; 'descendant of Maolcholm' or 'Maolcholuim' (servant of St. Columcille); an Antrim surname. The Four Masters, under the year 1061, record the death of Muireadhach Ua Maolcholuim, erenagh of Derry.
Alphabetical Index to Irish Surnames