Surnames: ABCDEFGHIJKLMNOPQRSTUVWXYZ
No Surnames: ABCDEFGHIJKLMNOPQRSTUVWXYZ
Octavia the Elder I.J.1.8, I.J.1.7.1, I.J.1.8 Oda of Bavaria I.M.1.4 Oda of Savoy I.D.2.2.22, I.D.7.6 Oda of Saxony I.D.9.5.8 Odoño II I.F.1.4.2 Offa I.3.5 Ogiva I.D.4.9.3 Oilliol I.D.1.1, I.D.1.13 Olaf I I.I.3.17 Olaf III I.I.2.5 Olaf the White of Dublin I.I.3.8 Ordoño I I.F.1.3 Ordoño II I.F.1.5 Ordoño III I.F.1.6.1, I.F.1.7 Otto I.M.1.6.9 Otto I. the Great I.M.1.6.7 Otto I., The Great, Emperor I.M.1.6.2 Otto I., the Great I.2.4.4 Otto the Great of Saxony I.D.2, I.M.1.5 Owen (Owain) Gwinedh (Gwynedd) I.C.1.24