O'Duignan O'Deignan
O'Durkan O'Zorkin
O'Dwan
O'Dwane
O'Dwyer
![Oedenberg [Bavaria] coat of arms Oedenberg [Bavaria] family crest](../jpg/oedenberg-bavaria.jpg)
![Oedendorf [Swabia] coat of arms Oedendorf [Swabia] family crest](../jpg/oedendorf-swabia.jpg)
![Oemen [Holland] coat of arms Oemen [Holland] family crest](../jpg/oemen-holland.jpg)
![Oertel [Saxony] coat of arms Oertel [Saxony] family crest](../jpg/oertel-saxony.jpg)
Oedenberg [Bavaria]
Oedendorf [Swabia]
Oeller
Oemen [Holland]
Oertel [Saxony]
Oettel
O'Fallon O'Falloon
O'Farren
O'Farren
![O'Feeney [Roscommon] coat of arms O'Feeney [Roscommon] family crest](../jpg/feeney-roscommon.jpg)
![Offena [Holland] coat of arms Offena [Holland] family crest](../jpg/offena-holland.jpg)
![Offerberg [Juliers] coat of arms Offerberg [Juliers] family crest](../jpg/offerberg-juliers.jpg)
O'Feely O'Fehilly
O'Feeney [Roscommon]
O'Fennelly
Offena [Holland]
Offerberg [Juliers]
Offignies
![Offley [Boston] coat of arms Offley [Boston] family crest](../jpg/offley-boston.jpg)
![Offredi [Geneva] coat of arms Offredi [Geneva] family crest](../jpg/offredi-geneva.jpg)
Offley [Boston]
Offredi [Geneva]
O'Fie O'Fee
O'Finnegan
O'Flaherty
O'Flanagan
O'Flannery
O'Flynn
O'Fogarty
O'Friel
Oftringen