Surnames: O
12,164 surnames on the memorials so far. Choose one to see everyone who bears it and the memorials they are on. Spellings that differ only in Mc or Mac, St or Saint, an apostrophe or an accent are one surname.
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O
- Oakden 1
- Oakes 14
- Oakeshott 1
- Oakey 5
- Oakins 1
- Oakley 9
- Oastler 1
- Oates 5
- Oats 3
- Oatway 1
- O'Beirne-Ryan 1
- O'Brain 1
- O'Brien 16
- O'Byrne 2
- O'Callaghan 3
- Ocaña Rubio 1
- O'Carroll 2
- O'Clerigh 2
- Ó Conaire 1
- Ó Conchubhair 1
- O'Connell 7
- O' Connellan 1
- O'Conner 1
- O'Connor 14
- Ó Dálaigh 1
- Odam 2
- Oddie 1
- Oddy 1
- Odell 11
- Oden 1
- Odo 1
- O'Donnell 4
- O'Donovan 1
- O'Driscoll 5
- O'Duignan 1
- O Dwyer 3
- of Angel Guardian 1
- Offen 4
- Offer 1
- Officer 1
- Offler 1
- Offord 3
- Ó Fiaich 1
- Ó Fitheallaigh 1
- O'Flaherty 1
- O'Flynn 1
- of Waterford 1
- Ogden 7
- Ogilive 1
- Ogilvie 1
- Ogilvy 1
- O'Grady 1
- O'Halloran 1
- O'Hara 1
- O'Hare 2
- Ó hEarcáin 1
- O'Higgins 1
- Ohtaki 1
- Oke 2
- O'Keefe 2
- O'Keeffe 1
- Okell 1
- Okushi 1
- Olausen 1
- Old 2
- Older 2
- Oldershaw 1
- Oldfield 4
- Oldham 6
- Oldman 1
- Oldridge 3
- Oldring 2
- Olds 2
- O'Leary 3
- Oliff 1
- Olive 2
- Oliver 32
- Olivey 1
- Olivier 1
- Ollerenshaw 1
- Ollerhead 2
- Ollerton 2
- Ollett 2
- Olley 5
- Olliff 1
- Olliver 2
- Olorenshaw 1
- Olsen 1
- Olson 1
- Ó Maoilíosa 1
- O'Mealie 1
- Omens 1
- O'Monaghan 1
- O'Mulconry 1
- Ó Murchú 1
- Oncken 1
- O'Neal 1
- O'Neil 2
- O'Neill 18
- Onions 1
- Onn 1
- O'Nolan 2
- Onslow 1
- Ó Nualláin 1
- Onyon 1
- [?]oolaston 1
- Oppenshaw 1
- Oram 6
- Orange 4
- Orbell 1
- Orbison 1
- Orchard 8
- Orchardson 1
- Ord 1
- Orde 1
- Ordish 1
- O'Regan 1
- O'Reilly 3
- O'Reily 1
- Orford 1
- Orgee 1
- Ormand 1
- Orme 4
- Ormerod 2
- Ormesher 1
- Ormiston 1
- Ormonde 2
- Ormrod 3
- Ormsby 4
- Ormsby Gore 1
- O'Rourke 2
- Orpet 1
- Orpin 2
- Orr 3
- Orrett 1
- Orr Ewing 2
- Orridge 1
- Orriss 2
- Orsman 1
- Ortiga 1
- Orton 9
- Orwell 2
- Orwin 1
- Osborn 3
- Osborne 45
- Osbourn 1
- Osbourne 2
- Osburn 1
- Oscroft 1
- O'Shaughnessy 3
- O'Shea 1
- Ó Siadhail 2
- Osler 2
- Osman 1
- Osmond 1
- Osterfield 2
- Ostler 1
- Ó Súilleabháin 2
- O' Sullivan 2
- Oswald 3
- Oswin 1
- Otaki 1
- Ottaway 1
- Otter 4
- Ottewell 2
- Ottey 1
- Otto 1
- Otway 1
- Oultram 1
- Outen 2
- Outhwaite 3
- Outram 3
- Outrim 1
- Ovenden 3
- Ovens 1
- Overbury 2
- Overend 1
- Overfield 2
- Overhill 1
- Overington 1
- Overland 2
- Overs 1
- Oversby 1
- Overton 14
- Overy 4
- Ovett 1
- Owen 40
- Owens 9
- Ownsley 1
- Owston 2
- Owtram 1
- Oxborough 1
- Oxborrow 4
- Oxbury 1
- Oxenham 1
- Oxford 4
- Oxlade 1
- Oxley 7
- Oxman 1
- Oxton 2
- Ozard 1
- Ozbirn 1
- Ozzard 2