| Name | M/F | Meaning |
|---|---|---|
| O-tisu | ![]() |
Meaning : Used in : Japanese |
| Obiajulu | ![]() |
Meaning : Used in : African, African |
| Obijesu | ![]() |
Meaning : Sacred Heart Of Jesus Used in : Nigerian |
| Obijiaku | ![]() |
Meaning : Used in : African |
| Odiinkemelu | ![]() |
Meaning : I Have Done Nothing Wrong Used in : African |
| Odinakachukwu | ![]() |
Meaning : Used in : African, African |
| Odogwu | ![]() |
Meaning : Conqueror Used in : Nigerian |
| Odumeguru | ![]() |
Meaning : Used in : African |
| Ofiu | ![]() |
Meaning : Used in : Australian |
| Ofoedu | ![]() |
Meaning : Used in : African |
| Ogochukwu | ![]() |
Meaning : Used in : African, African |
| Oikku | ![]() |
Meaning : Splendid, Excellent Used in : Finnish |
| Okajuurou | ![]() |
Meaning : Used in : Japanese |
| Okatarou | ![]() |
Meaning : Used in : Japanese |
| Okcu | ![]() |
Meaning : Used in : German |
| Okechuku | ![]() |
Meaning : Used in : African |
| Okechukwu | ![]() |
Meaning : Used in : African, Australian |
| Okijirou | ![]() |
Meaning : Used in : Japanese |
| Okisaburou | ![]() |
Meaning : Used in : Japanese |
| Okitsugu | ![]() |
Meaning : Used in : Japanese |
| Oku | ![]() |
Meaning : Divine Spearer Used in : Finnish |
| Okurou | ![]() |
Meaning : Used in : Japanese |
| Okusaburou | ![]() |
Meaning : Used in : Japanese |
| Okwudilichukwu | ![]() |
Meaning : Used in : African |
| Olaniyonu | ![]() |
Meaning : Used in : African |
| Olau | ![]() |
Meaning : Used in : Danish |
| Olkku | ![]() |
Meaning : Family Descendent Used in : Finnish |
| Ollu | ![]() |
Meaning : Family Descendent Used in : Finnish |
| Olu | ![]() |
Meaning : Preeminent Used in : African, Finnish, Swedish, Danish |
| Oluchukwu | ![]() |
Meaning : Used in : African, African, Australian |
| Olwethu | ![]() |
Meaning : Ours Used in : African |
| Oma-ru | ![]() |
Meaning : Used in : Japanese |
| Ompatu | ![]() |
Meaning : Used in : Hindu |
| On'ichirou | ![]() |
Meaning : Used in : Japanese |
| Onchu | ![]() |
Meaning : Fierce Hound Used in : Irish |
| Onisaburou | ![]() |
Meaning : Used in : Japanese |
| Onitarou | ![]() |
Meaning : Used in : Japanese |
| Onjefu | ![]() |
Meaning : Used in : African |
| Onuchukwu | ![]() |
Meaning : Used in : African, African |
| Onwuamaegbu | ![]() |
Meaning : Used in : African |
| Onwuatuegwu | ![]() |
Meaning : Used in : African |
| Onwumelu | ![]() |
Meaning : Used in : African |
| Onyekaozulu | ![]() |
Meaning : Used in : African |
| Onyeorulu | ![]() |
Meaning : Used in : African, African |
| Onyeoruru | ![]() |
Meaning : Used in : African, African |
| Onzaburou | ![]() |
Meaning : Used in : Japanese |
| Orafu | ![]() |
Meaning : Used in : Japanese |
| Oraru | ![]() |
Meaning : Used in : Japanese |
| Oregu | ![]() |
Meaning : Used in : Japanese |
| Oritarou | ![]() |
Meaning : Used in : Japanese |
| Oryo-ru | ![]() |
Meaning : Used in : Japanese |
| Osamu | ![]() |
Meaning : Used in : Australian, Japanese |
| Oshirou | ![]() |
Meaning : Used in : Japanese |
| Osku | ![]() |
Meaning : Divine Spear, Gentle Friend Used in : Finnish |
| Osmu | ![]() |
Meaning : Young Man Used in : Finnish |
| Osondu | ![]() |
Meaning : Used in : African |
| Ospetsu | ![]() |
Meaning : Used in : Basque |
| Osuiu | ![]() |
Meaning : Used in : Anglo |
| Oswiu | ![]() |
Meaning : Name Of A King Used in : Anglo, British, English |
| Oswudu | ![]() |
Meaning : Used in : British, English |
| Otakagu | ![]() |
Meaning : Used in : African |
| Otitodilichukwu | ![]() |
Meaning : Used in : African, African |
| Otogorou | ![]() |
Meaning : Used in : Japanese |
| Otoichirou | ![]() |
Meaning : Used in : Japanese |
| Otojirou | ![]() |
Meaning : Used in : Japanese |
| Otojurou | ![]() |
Meaning : Used in : Japanese |
| Otokazu | ![]() |
Meaning : Used in : Japanese |
| Otosaburou | ![]() |
Meaning : Used in : Japanese |
| Otoshirou | ![]() |
Meaning : Used in : Japanese |
| Ototarou | ![]() |
Meaning : Used in : Japanese |
| Otoyoku | ![]() |
Meaning : Used in : Japanese |
| Otsurou | ![]() |
Meaning : Used in : Japanese |
| Otu | ![]() |
Meaning : Collecting Seashells In A Basket Used in : Finnish |
| Otutodilichukwu | ![]() |
Meaning : Used in : African, African |
| Ouichirou | ![]() |
Meaning : Used in : Japanese |
| Oujirou | ![]() |
Meaning : Used in : Japanese |
| Ourou | ![]() |
Meaning : Used in : Japanese |
| Outarou | ![]() |
Meaning : Used in : Japanese |
| Ovidiu | ![]() |
Meaning : In Romanian meaning is : worker Used in : Australian, Romanian |
| Owusu | ![]() |
Meaning : Used in : African |
| Ozgu | ![]() |
Meaning : Used in : Australian |
| Ozu | ![]() |
Meaning : Used in : Japanese |