| German baby names begining from O |
| Oates |
 | Variant of Odo: Wealth. |
| Oberon |
| Noble and bear-like. In a Midsummer Night's Dream, Shakespeare altered the spelling of Auberon (King of the fairies) to Oberon. |
| Oda |
 | Elfin spear. |
| Odbart |
| Wealthy. |
| Oddie |
| Variant of Odo: Wealth. |
| Odelina |
| Elfin spear. |
| Odette |
| Variant of Ottilia: Of the fatherland; fortunate heroine. Can also be a feminine variant of Odo: Wealthy. |
| Odhert |
| Wealthy. |
| Odiana |
| Elfin spear. |
| Odiane |
| Elfin spear. |
| Odila |
| Elfin spear. |
| Odile |
| Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. |
| Odo |
| Wealth. |
| Olinda |
| Defender of the land. |
| Oliver |
| Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. |
| Olivier |
| Variant of Oliver: Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. |
| Ollie |
 | Diminutive of Oliver: Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. |
| Orbart |
| Wealthy. |
| Orbert |
| Wealthy. |
| Ordalf |
| Elfin spear. |
| Ordella |
| Elfin spear. |
| Oriel |
| Compound of 'fire' and 'strife'. |
| Orlan |
| Renowned in the land. Form of Roland. |
| Orland |
| Renowned in the land. Form of Roland. |
| Orlando |
| Variant of Roland: Famed land; renowned in the land. |
| Orlin |
| Renowned in the land. Form of Roland. |
| Orlondo |
| Renowned in the land. Form of Roland. |
| Oswald |
| Power of God. |
| Othman |
| Wealthy. |
| Othmann |
| Wealthy. |
| Otho |
| Wealthy. |
| Othomann |
| Wealthy. |
| Otilie |
| Fortunate heroine. |
| Otis |
| Wealthy. |
| Otka |
| Fortunate heroine. |
| Otthild |
| Fortunate heroine. |
| Otthilda |
| Fortunate heroine. |
| Otthilde |
| Fortunate heroine. |
| Ottila |
| Fortunate heroine. |
| Ottilia |
| Of the fatherland; fortunate heroine. |
| Ottilie |
| Elfin spear. Can also be a feminine variant of Odo: Wealthy, or of Ottilia: of the fatherland; fortunate heroine. |
| Otto |
| Born eighth or wealthy. |
| Ottokar |
| Happy fighter. |
| Otylia |
| Fortunate heroine. |
| |
