Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 101 | Ohitekah | NativeAmerican | Brave (Sioux). | M | |
| 102 | Oidhche | Scottish | Night. | M | |
| 103 | Oighrig | Greek | Well spoken. | M | |
| 104 | Oilibhear | Norse | Relic. | M | |
| 105 | Oistin | Latin | Revered. | M | |
| 106 | Okes | English | From the oak. | M | |
| 107 | Okhmhaka | NativeAmerican | Little wolf (Cheyenne). | M | |
| 108 | Okpara | Egyptian | First born. | M | |
| 109 | Ol | Welsh | Legendary son of Olwydd. | M | |
| 110 | Ola | Norse | Relic. | M | |
| 111 | Olaf | Danish | Family. | M | |
| 112 | Olaf | Norse | Relic; ancestral heritage. St. Olaf is the patron saint of Norway, and there were many kings in Scandinavia named Olaf. | M | |
| 113 | Olaf | Scandinavian | Ancestral heritage. | M | |
| 114 | Olaf | Swedish | Andent. | M | |
| 115 | Olaf | Teutonic | Relic. | M | |
| 116 | Olav | Norse | Variant of Olaf: Relic; ancestral heritage. | M | |
| 117 | Olave | Norse | Variant of Olaf: Relic; ancestral heritage. | M | |
| 118 | Ole | Danish | Family. | M | |
| 119 | Ole | Norse | Relic. | M | |
| 120 | Oleg | Russian | Holy. | M | |