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 O Surnames Family History Resources

Surnames, their origin and their meaning

Many surnames are associated with the place/locality of where the family lived and in those cases the location is noted as the meaning.
Many surnames are associated with the occupation of the person given the name.

eXpertGenealogy.com is a directory of Professional Genealogists, Ancestry and Family Tree Researchers.

Surname		Origin	Meaning
Oakes		Locality	From a dwelling near the oak-trees.
Oakham		Locality	From the town of Oakham, in Rutlandshire, England
Oakley		Locality	The fields or pasture abounding in oaks
OBierne			descendants of Byrne
OBoyle			Ó Baoighill
OBrien			descendant of Brien
OByrne			descendants of Bran
OCallaghan		Celtic-Gaelic	descendants or tribe of Callaghan
Ochiern		Gaelic	the heir apparent to a lordship
Ockham		Locality	a town in Surrey, England, so called from the abundance of oaks growing there
Ockley		Saxon	oak field
OConnor			descendants of Conor
OConor			descendants of Conor
ODevlin			descendant of Develin
ODonnell			descendants of Donal
ODonoghue			descendants of Donogh
ODonovan			descendants of Donovan
ODorcy			descendant of Dorcy
ODougherty			chief of the oak habitation
ODugan			descendant of Dugan
OFlaherty			descendant of Flaherty
Ogden		Saxon	oak vale
Ogilvie		Locality	the lands of Ogilvie, in Scotland
OGowan			descendant of Gowan
OHara			descendant of Hara
Oigthierna		Gaelic	heir apparent to a lordship,
OKeefe			descendant of Kief
OLeary			descendant of Lary
Olifant			An elephant
Oliver			from the olive-tree
Ollendorff		Locality	Oldendorf in Germany
Olmstead		Locality	A place or town by the green oaks
Olsen		Scandinavian	son of Olaf
OMahony			descendant of Mahon
OMalley			descendant of Malley
Onderdonk		Dutch	Under grace or pardon
ONeil			descendants of Neil
Onslow		Locality	the manor of Onslow, in Shropshire, England
OQuin			descendants of Con Ceadcaha
Orchard		Locality	An inclosure of fruit-trees
Orme		French	elm-tree
Ormiston		Locality	The town or village of elms
Ormsby			a place surrounded by elms
Orr		Locality	town of Orr, in Scotland
Ortega		Spanish	Ortega in Coruña province
Ortiz		Spanish	son of Orti
Orton		Locality	town of Orton, in Westmoreland, England
Orvis		Cornish-British	place on or near an entrenchment
Osborn		Saxon	From hus, a house, and bearn, a child--a family-child, an adopted child.
Osmund		Saxon	From hus, a house, and mund, peace
Osterhoudt		Dutch	The east wood, from oost or oster, east, and houdt, a wood
Ostheim		German	From Ost, east, and heim, a home, habitation or village
Ostrander		Dutch	The lord of the east shore
Oswald		Saxon	From hus, a house, and wald, a ruler
Otis		Greek	quick hearing
OToole			descendants of Tuathal
Otter		Locality	a low promontory jutting into the sea, a shoal.
Oudekirk		Dutch	town in Holland
Ouseley		Locality	the river Ouse, in England
Outhoudt		Dutch	The old wood
Owen		Celtic	The good offspring
Oxford		Locality	Oxford, in England

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