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

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

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