| Surname | Individuals |
|---|---|
|
Obotrites
of the Obotrites |
1 1 2 |
|
van Ochten
|
6 |
|
Ockeloen
|
1 |
|
von Odenkirchen
|
1 |
|
of Oeren
|
1 |
|
Oesminck
|
1 |
|
of Alsace
|
1 |
|
of Anjou
|
5 |
|
of Auxere
|
2 |
|
of Brittany
|
3 |
|
of Burgundy
|
3 |
|
of Falaise
|
1 |
|
of Franconia
|
3 |
|
of Hainaut
|
1 |
|
of Leuven
|
3 |
|
of Lower Lorraine
|
1 |
|
of Maine
|
1 |
|
of Meaux
|
1 |
|
of Neustria
|
1 |
|
of Normandy
|
1 |
|
of Provence
|
1 |
|
of Rennes
|
1 |
|
of Vermandois
|
1 |
|
of Wessex
|
2 |
|
van Ogten
|
1 |
|
van Ojen
|
1 |
|
Olafsson
|
1 |
|
Olavson
|
1 |
|
van Oldenburg
|
1 |
|
van Olderen
|
7 |
|
Olijf
|
5 |
|
Oliviers
|
1 |
|
van Ommeren
|
52 |
|
onbekend
|
1 |
|
Onink
|
7 |
|
van Ooij
|
1 |
|
van Ooijen
|
1 |
|
van Oordt
|
1 |
|
van Oort
|
23 |
|
van Opheusden
|
1 |
|
van Opijnen
|
1 |
|
Opperman
|
3 |
|
of Orléans
|
2 |
|
van Os
|
27 |
|
van Osch
|
2 |
|
van Osenbrugge
|
7 |
|
van Osenbruggen
|
5 |
|
van Osnabruggen
|
1 |
|
van Ossenbruggen
|
2 |
|
Otten
|
6 |
|
Otten van Ewijk
|
1 |
|
Ottens van Ewick
|
1 |
|
Ottensen
|
1 |
|
den Otter
|
2 |
|
Ousen
|
6 |
|
Overeem
|
1 |