| Name | Origin | Planet | Metall | Zodiac | Lucky number |
| ♂ Ol | England | ♂ Mars, ♃ Jupiter | Iron | ♈ Aries,♐ Sagittarius | 9/9 |
| ♂ Ola | Nigeria | ☉ Sun | Gold | ♌ Leo | 10/1 |
| ♂ Olaf | Scandinavia | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 16/7 |
| ♂ Oleg | Slovakia | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 21/3 |
| ♂ Oleif | Norway | ☾ Moon | Silver | ♎ Libra | 29/2 |
| ♂ Olen | Norway | ☉ Sun | Gold | ♌ Leo | 19/1 |
| ♂ Oleos | Spain | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 21/3 |
| ♂ Oles | Greece | ♀ Venus | Copper | ♎ Libra,♉ Taurus | 15/6 |
| ♂ Olezka | Russia | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 25/7 |
| ♂♀ Olin | Norway | ☿ Mercury, ♅ Uranus | Mercury | ♊ Twins,♒ Aquarius | 23/5 |
| ♂ Oliphant | Scotland | ☿ Mercury, ♅ Uranus | Mercury | ♊ Twins,♒ Aquarius | 41/5 |
| ♂ Olis | Germany | ☉ Sun | Gold | ♌ Leo | 19/1 |
| ♂ Oliver | Danish | ♂ Mars, ♃ Jupiter | Iron | ♈ Aries,♐ Sagittarius | 36/9 |
| ♂ Oliverio | Spain | ♀ Venus | Copper | ♎ Libra,♉ Taurus | 51/6 |
| ♂ Oliverios | Spain | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 52/7 |
| ♂ Olivier | France | ♂ Mars, ♃ Jupiter | Iron | ♈ Aries,♐ Sagittarius | 45/9 |
| ♂ Ollaneg | England | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 30/3 |
| ♂ Ollie | French | ♂ Mars, ♄ Saturn | Iron, Tin | ♏ Scorpio,♑ Capricorn | 26/8 |
| ♂ Olliver | Latin-America | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 39/3 |
| ♂ Olney | England | ♂ Mars, ♄ Saturn | Iron, Tin | ♏ Scorpio,♑ Capricorn | 26/8 |
| ♂ Olof | Norway | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 21/3 |
| ♂ Olvaerr | Norway | ☉ Sun | Gold | ♌ Leo | 37/1 |
| ♂ Olvan | Latin-America | ☉ Sun | Gold | ♌ Leo | 19/1 |
| ♂ Olvir | Norway | ♄ Saturn, ☿ Mercury | Tin | ♍ Virgo | 31/4 |
| ♂ Olwydd | England | ☾ Moon | Silver | ♎ Libra | 29/2 |
| ♂ Olyn | Norway | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 21/3 |
| ♂ Om | Norway | ☉ Sun | Gold | ♌ Leo | 10/1 |
| ♂ Oma | Arabia | ☾ Moon | Silver | ♎ Libra | 11/2 |
| ♂ Omar | Arabia | ☾ Moon | Silver | ♎ Libra | 20/2 |
| ♂ Omari | African | ☾ Moon | Silver | ♎ Libra | 29/2 |
| ♂ Omarr | African | ☾ Moon | Silver | ♎ Libra | 29/2 |
| ♂ Omawnakw | Native-American | ☾ Moon | Silver | ♎ Libra | 29/2 |
| ♂ Omayma | Africa | ☿ Mercury, ♅ Uranus | Mercury | ♊ Twins,♒ Aquarius | 23/5 |
| ♂ Omdearoop | India | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 48/3 |
| ♂ Omeet | Hebrew | ♄ Saturn, ☿ Mercury | Tin | ♍ Virgo | 22/4 |
| ♂♀ Omega | Greece | ☿ Mercury, ♅ Uranus | Mercury | ♊ Twins,♒ Aquarius | 23/5 |
| ♂ Omer | Arabia | ♀ Venus | Copper | ♎ Libra,♉ Taurus | 24/6 |
| ♂ Omet | Hebrew | ♂ Mars, ♄ Saturn | Iron, Tin | ♏ Scorpio,♑ Capricorn | 17/8 |
| ♂ Omkar | India | ♄ Saturn, ☿ Mercury | Tin | ♍ Virgo | 22/4 |
| ♂ Omkareshwar | India | ♀ Venus | Copper | ♎ Libra,♉ Taurus | 51/6 |
| ♂ Ommar | Arabia | ♀ Venus | Copper | ♎ Libra,♉ Taurus | 24/6 |
| ♂ Omolf | Norway | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 25/7 |
| ♂ Omparkash | India | ♃ Jupiter | Zinc, Tin | ♓ Pisces, ♐ Sagittarius | 39/3 |
| ♂ Omran | Africa | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 25/7 |
| ♂ Omri | Africa | ☉ Sun | Gold | ♌ Leo | 28/1 |
| ♂♀ On | China | ☾ Moon | Silver | ♎ Libra | 11/2 |
| ♂ Onan | Turkey | ♂ Mars, ♄ Saturn | Iron, Tin | ♏ Scorpio,♑ Capricorn | 17/8 |
| ♂ Ondrus | Czech-Republic | ☉ Sun | Gold | ♌ Leo | 28/1 |
| ♂ Ondyaw | England | ☉ Sun | Gold | ♌ Leo | 28/1 |
| ♂ Onesimus | Israel | ☾ Moon, ♆ Neptune | Zinc, Tin | ♓ Pisces,♍ Virgo | 34/7 |