Clans and Families
of Ireland and Scotland
Appendix II - A List of
Surnames
Families
Ethnic Group
Branch of
O'Kiernan
Laigin
O'Kinneally
Erainn
O'Lalor, Lawlor
Cruithne
O'Leary
Erainn
O'Lee
Gaels
O'Lonergan
Erainn
O'Loughlin
MacLoughlin (Ulster)
O'Loughlin
Erainn
O'Lynch
Cruithne
O'Lynch
IV - Donegal, Connacht, Munster
O'Lynn
Laigin
O'Madden
Laigin
O'Maher
O'Carroll
O'Mahony
Gaels
O'Malley
Erainn
O'Malone
Gaels
O'Mannin
Cruithne
O'Meara
Erainn
O'Meehan
IVL - Louth, Clare, Galway
O'Meehan
MacCarthy
O'Mellan
O'Neill (Ulster)
O'Moledy
O'Farrell
O'Molloy
Gaels
O'Molloy
Gaels
O'Connor
O'Molony
Erainn
O'Monahan
Laigin
O'Mooney
Laigin
O'Connor
O'Morchoe
Laigin
O'More
Cruithne
O'Moriarty
O'Donoghue
O'Moroney
Erainn
O'Mulconry
Gaels
O'Connor
O'Mulderry
O'Donnell
Muldrew, Muldragh
O'Mulderry
O'Mullally
Laigin
O'Mullen
O'Concannon
O'Mullen
IVL - Ulster
O'Mulroony
Laigin
O'Mulryan
Laigin
O'Mulvihil
Gaels
O'Connor
O'Murphy
Kinsella
O'Naghten, Naughton
Laigin
O'Naghten, Naughton
IVL - Clare
O'Neill
Gaels
O'Neill
IVL - South Ireland
O'Nihill
Erainn
O'Nolan
O'More
O'Phelan
Erainn
O'Quigley
Gaels
O'Quin
O'Farrell
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