Surname Origins and Variants
M
Madden MacAvaddy, O'Madden, Madigan
Maher, O'Meagher, Meagher, O'Maher, Mahir
Mahon MacMahon, MacMann, MacMahan, MacMohan
Malley, Mallay, Mally, O'Mally, Mailley, O'Malley, O'Mailey, Mailey
Mangan, Mongan, Mongin, Mungan, Mungen, Mongun, O'Mongan, O'Mongin, O'Mungen, O'Mongun, O'Mongun, O'Mangan
Mannion, O'Mannin, O'Mannion, Mannyan, Mennon
Martin, Martyn, Gilmartin, Kilmartin, MacKilmartin, MacGilmartin
Mather, Maider, Maddir, Mador, Madeer, Mathers
McCormack, Cormack, MacCormack, McCormick, MacCormick, Cormac, Cormick, Cormyck, Kormack, Kormick, Cormach, Cormich, Cormiche
McDermot, Dermott, Dermot, Dermitt, Dermit, McDermott, Dermutt, Dermut, MacDermott, MacDermot, MacDermitt, McDermitt, MacDermit
McDonagh, Donaghey, McDonogh, McDonnogh
McGrath, MacGrath, MacGraw, MacGrauth, Magrath, Magraw
McHugh, MacHugh, McCue, MacCue, MacKew, McKew
McLaughlin, MacLoughlin, McLoughlin, MacGloughlin, Lochlain
McNiven Niven, Nevin, Nevins, Nivens, Navin, Newin, Nevane, Niffen, Nifen, Niving, Neving, Newing, Neiven, Nivine, Nevison, Niveson
Miland MacMillan, MacMullan, MacMullen, McMullen, McMullin, McMullan, McMillan, MacMullin
Mitchell, Michel, Michell, Mitchill, Mychell, Mitcham
Mooney, Moony, O'Mooney, Meeny, O'Meany, Meany, O'Meeny, O'Mainy, Meaney
Morris, Fitzmaurice, Fitzmorris, FitzMaurice, FitzMorris
Morrissey, O'Morrissey
Morrisroe Morris, Morriss, Moriss, Morrice, Morice, Moris
Murdock, Murdoch
Murray, Murrey, Moray, Morey, Morrey, Morry, Murry
McGough, Geoghegan, Gagahan, Gahagan, Gahaghan, Gaghan, Gegan, MacGeoghegan, Geohan
McGuff, McGough, MacFie, MacFee, MacDuffie, MacPhee, MacGuffie, MacCuffie, MacPhie, Maffie, Maffey
MacHale, McHale, MacHail, McHail, McCale, MacCale
McNally, McAnully, McAnalley, McAnally, Nally
McTighe, MacTeige, McTeige, MacTigue, McTigue, MacCaig, MacCaige, McCaig, McCaige, MacKaig, McKaig, MacKeague, McKeague, McKeage, MacTague, Tighe
Meehan, Meighan, Meegin, Meeghen, Meegan, Meakin, Meakins, Mekins, Mehan, Mehen, Mehigan, Mehegan, O'Meighan, O'Meehan
Mohan, Moyon, Moion, Mohun, Moyne, Munn, Munns, Munson, Munton, Mwn, Mun, Munds, Mouns, Muns, Munnes, Munnson, Munnsen, Munning
Molloy, Mulloy, Miley, O'Molloy, O'Mulloy, Mullee
Monahan, Monaghan, Monagham, Monahon, Monagan, Mongan, Monaugher, Monck
Moran, O'Moran, Murrin, Murran
Mulligan, O'Mulligan, Mullican, Mullighan, Mulliken
Mullowney, Molony, Maloney, O'Maloney, O'Molony, MacLoughney
Mullen, Mullin, Mullis, Mullins, Mullens, Mullings, Mullan, Mullens, O'Mullen, O'Mullan