| Ojal | - | Hindu Name | Obed-edom | - | Biblical Name |
| Obed | - | Biblical Name | Obal | - | Biblical Name |
| Obadiah | - | Biblical Name | Oviya | - | Hindu Name |
| Orpita | - | Hindu Name | Onella | - | Hindu Name |
| Omvati | - | Hindu Name | Omkari | - | Hindu Name |
| Omkareshwari | - | Hindu Name | Omisha | - | Hindu Name |
| Omana | - | Hindu Name | Omala | - | Hindu Name |
| Omaja | - | Hindu Name | Ojaswini | - | Hindu Name |
| Ojasvi | - | Hindu Name | Oja | - | Hindu Name |
| Oindrila | - | Hindu Name | Oditi | - | Hindu Name |
| Odathi | - | Hindu Name | Oviyan | - | Hindu Name |
| Ottakoothan | - | Hindu Name | Orion | - | Hindu Name |
| Ori | - | Hindu Name | Oppilmani | - | Hindu Name |
| Oorjit | - | Hindu Name | Oojam | - | Hindu Name |
| Oni | - | Hindu Name | Omswaroop | - | Hindu Name |
| Omrao, umrao | - | Hindu Name | Omprakash | - | Hindu Name |
| Ompati | - | Hindu Name | Omkarnath | - | Hindu Name |
| Omkar | - | Hindu Name | Omja | - | Hindu Name |
| Omeshwar | - | Hindu Name | Omesa | - | Hindu Name |
| Omarjeet | - | Hindu Name | Omar | - | Hindu Name |
| Oma | - | Hindu Name | Omanand | - | Hindu Name |
| Om | - | Hindu Name | Ojayit | - | Hindu Name |
| Ojas | - | Hindu Name | Ommar | - | Algerian Name |
| Osama | - | Algerian Name | Onslow | - | Algerian Name |
| Osman | - | Algerian Name | Omer | - | Algerian Name |
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