| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1181 | Olivier | German | Variant of Oliver: Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. | M | |
| 1182 | Ollie | German | Diminutive of Oliver: Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. | M | |
| 1183 | Orbart | German | Wealthy. | M | |
| 1184 | Orbert | German | Wealthy. | M | |
| 1185 | Ordalf | German | Elfin spear. | F | |
| 1186 | Ordella | German | Elfin spear. | F | |
| 1187 | Oriel | German | Compound of 'fire' and 'strife'. | F | |
| 1188 | Orlan | German | Renowned in the land. Form of Roland. | M | |
| 1189 | Orland | German | Renowned in the land. Form of Roland. | M | |
| 1190 | Orlando | German | Variant of Roland: Famed land; renowned in the land. | M | |
| 1191 | Orlin | German | Renowned in the land. Form of Roland. | M | |
| 1192 | Orlondo | German | Renowned in the land. Form of Roland. | M | |
| 1193 | Oswald | German | Power of God. | M | |
| 1194 | Othman | German | Wealthy. | M | |
| 1195 | Othmann | German | Wealthy. | M | |
| 1196 | Otho | German | Wealthy. | M | |
| 1197 | Othomann | German | Wealthy. | M | |
| 1198 | Otilie | German | Fortunate heroine. | F | |
| 1199 | Otis | German | Wealthy. | M | |
| 1200 | Otka | German | Fortunate heroine. | F | |