Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Og | Biblical | A cake, bread baked in ashes. | M | |
| 42 | Ogaleesha | NativeAmerican | Wears a red shirt (Sioux). | M | |
| 43 | Ogilhinn | Scottish | From the high peak. | M | |
| 44 | Ohad | Biblical | Praising, confessing. | M | |
| 45 | Ohanko | NativeAmerican | Reckless. | M | |
| 46 | Ohanzee | NativeAmerican | Shadow (Sioux). | M | |
| 47 | Ohel | Biblical | Tent, tabernacle, brightness. | M | |
| 48 | Ol | Welsh | Legendary son of Olwydd. | M | |
| 49 | Olaf | Danish | Family. | M | |
| 50 | Olaf | Norse | Relic; ancestral heritage. St. Olaf is the patron saint of Norway, and there were many kings in Scandinavia named Olaf. | M | |
| 51 | Olaf | Scandinavian | Ancestral heritage. | M | |
| 52 | Olaf | Swedish | Andent. | M | |
| 53 | Olav | Norse | Variant of Olaf: Relic; ancestral heritage. | M | |
| 54 | Oleif | Norse | Relic descendant. | M | |
| 55 | Oliphant | Scottish | Great strength. | M | |
| 56 | Oliver | English | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. 'Extending an olive branch' signifies an offer of peace. | M | |
| 57 | Oliver | French | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace. | M | |
| 58 | Oliver | German | Elf army. Can also be a variant of Olaf: Relic, ancestral heritage. | M | |
| 59 | Oliver | Latin | Olive (symbol of peace); peaceful. | M | |
| 60 | Oliver | English | Oliver is a masculine name of Old English origin, from the Latin oliva, meaning “olive tree.” As a symbol of peace and goodwill, the olive branch evokes harmony and dignity. Oliver has surged in popularity across the US, Canada, and the UK, admired for its warm, timeless sound and classic roots. | M | |