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Other 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
OBierne			descendants of Byrne
OBoyle			Ó Baoighill
OBrien			descendant of Brien
OByrne			descendants of Bran
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
OGowan			descendant of Gowan
OHara			descendant of Hara
OKeefe			descendant of Kief
OLeary			descendant of Lary
Olifant			An elephant
Oliver			from the olive-tree
OMahony			descendant of Mahon
OMalley			descendant of Malley
ONeil			descendants of Neil
OQuin			descendants of Con Ceadcaha
Ormsby			a place surrounded by elms
OToole			descendants of Tuathal

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