Name-based Surnames
Surnames originally derived from parental names, given names, nicknames, etc.
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- Nicks
- Nickson
- Nicol
- Nicoll
- Nicolls
- Nicolson
- Nielson
- Nightingale
- Nisbett
- Nish
- Niven
- Nixon
- Noah
- Noblett
- Noel
- Noor
- Noreen
- Nulty
- O'Beirne
- O'Boyle
- O'Brian
- O'Brien
- O'Bryan
- O'Byrne
- O'Callaghan
- O'Carroll
- O'Connell
- O'Connor
- O'Doherty
- O'Donnell
- O'Donoghue
- O'Donovan
- O'Dowd
- O'Driscoll
- O'Dwyer
- O'Farrell
- O'Flaherty
- O'Flynn
- O'Gara
- O'Grady
- O'Hagan
- O'Halloran
- O'Hanlon
- O'Hara
- O'Hare
- O'Kane
- O'Keefe
- O'Keeffe
- O'Kelly
- O'Leary
- O'Loughlin
- O'Mahony
- O'Malley
- O'Mara
- O'Meara
- O'Melia
- O'Neal
- O'Neale
- O'Neil
- O'Neill
- O'Regan
- O'Reilly
- O'Riordan
- O'Rorke
- O'Rourke
- O'Shaughnessy
- O'Shea
- O'Sullivan
- O'Toole
- Oates
- Old
- Olive
- Oliver
- Ollis
- Olson
- Orange
- Orson
- Osborn
- Osborne
- Osgood
- Osman
- Oswald
- Otter
- Otterson
- Overson
- Owen
- Owens
- Pace
- Paddison
- Padgett
- Paget
- Pagett
- Paine
- Pallett
- Parkin
- Parkins
- Parkinson
- Parlett
- Parrett
- Parris