| Otto | German | From the Old High German Otho and O.. |  |  |
| Otto | Hungarian | From the Old High German Otho and O.. |  | |
| Otto | Polish | A borrowing from the German, Otto o.. | | |
| Otto | Norwegian | The name of Saint Odo of Cluny.
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| Ottokar | German | "Happy warrior." |  | |
| Ouray | Native Amer.. | The arrow. Ute. The name was borne .. |  | |
| Ourayi | Native Amer.. | This name can either signify "arrow.. | | |
| Ovadya | Hebrew | Meaning "servant of God." A prophet.. | | |
| Oved | Hebrew | Servant, serving. The name was born.. | | |
| Owain | Welsh | A popular name of uncertain derivat.. | | |
| Owen | American | Oi uncertain derivation, some belie.. | | |
| Owen | Irish | Anglicized form of Eoghan (well-bor.. | | |
| Owney | Irish | Meaning "elderly." | | |
| Oystein | Norwegian | Meaning "rock of happiness." 0ystei.. | | |
| Oz | Hebrew | Strength. The name Oz is also used .. | | |
| Ozni | Hebrew | Hearing, my hearing. The name was b.. | | |
| Ozuru | Japanese | Big stork | | |
