These names have been taken from secondary sources and could be wrongly projected, therefore please recheck with Friends and your family members before naming your child.
| Name | Gender | Meaning | |
| OppilaMani | boy | Peerless Gem | U |
| Oppilan | boy | Peerless Gem | U |
| Ori | boy | Name of a Charitable King | U |
| OttaKoothan | boy | Name of a Poet | U |
| Oviyan | boy | Artist | U |
| Om | boy | The Sacred Syllable | U |
| Oli | boy | Courageous | U |
| Ogan | boy | Wave | U |
| Omar | boy | An Era | U |
| Omja | boy | Born of Cosmic Unity | U |
| Omeshwar | boy | Lord of the Om | U |
Please comment on the above names. Please point out any errors & also please tell us how common / unique these tamil baby boy names are