| Name | M/F | Meaning |
|---|---|---|
| Ogan | ![]() |
Meaning : Used in : Hindu, Turkish, Irish |
| Oguz | ![]() |
Meaning : Used in : Australian, Turkish, German, Hungarian |
| Ohannes | ![]() |
Meaning : Used in : Australian, Turkish |
| Okan | ![]() |
Meaning : Used in : Australian, Turkish, German |
| Oktar | ![]() |
Meaning : Used in : Turkish, German |
| Oktay | ![]() |
Meaning : Used in : Australian, Turkish, German |
| Okyay | ![]() |
Meaning : Used in : Turkish, German |
| Olcay | ![]() |
Meaning : Used in : Australian, Turkish, German, German, Australian, Turkish |
| Onan | ![]() |
Meaning : Used in : Japanese, Turkish, Irish |
| Onur | ![]() |
Meaning : Honour. Used in : Australian, Turkish, German, Australian |
| Onuralp | ![]() |
Meaning : Used in : Turkish, German |
| Orhan | ![]() |
Meaning : Army Commander Used in : Australian, Turkish, French, German, Australian |
| Orkun | ![]() |
Meaning : Used in : Australian, Turkish, German |
| Orkut | ![]() |
Meaning : Used in : Australian, Turkish |
| Othman | ![]() |
Meaning : Used in : Arabic, Australian, Malaysian, Turkish, German |
| Oytun | ![]() |
Meaning : Used in : Australian, Turkish, German |
| Oyuz | ![]() |
Meaning : Used in : Turkish |
| Ozalan | ![]() |
Meaning : Used in : Turkish |
| Ozan | ![]() |
Meaning : Poet Used in : Australian, Turkish, German |