Baby Boy Names A–Z with Meanings, Numerology & Origin
Explore a wide collection of baby boy names with beautiful meanings, numerology, lucky numbers and origins. Browse A–Z to discover traditional, modern and trending boy names chosen by parents worldwide.
Baby Boy Names Beginning with O
Names starting with O stand for openness, optimism, and originality. Baby names beginning with O often sound strong and uplifting. From Olivia and Omar to Omkar and Owen, they symbolize hope, harmony, and creativity. O-names feel modern and inspiring, perfect for those who embrace positivity and individuality.
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| Alphabet | Name | Meaning | Numerology | Ruling Planet | Lucky Day | Lucky Colour | Lucky Number(s) | Traits | Religion | Gender | Origin |
|---|---|---|---|---|---|---|---|---|---|---|---|
| O | Ossian | Ossian — a classic choice tied to Little deer | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | Celtic, Irish |
| O | Ossie | Ossie — a graceful name meaning Noble strength | 4 | Rahu (Uranus) | Saturday | Grey | 4, 13, 22, 31 | Organized, Hardworking, Loyal, Trustworthy | General | Boy | English, Western |
| O | Osten | Osten — a unique name that means Eastern | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | Germanic |
| O | Osvaldo | Osvaldo — a timeless choice symbolizing Divine power | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | Spanish, Latin |
| O | Osvin | Osvin — a timeless choice symbolizing Divine friend | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | English, Western |
| O | Oswald | Oswald — shining with the meaning of Divine ruler | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | English, Western |
| O | Oswaldo | Oswaldo — a radiant choice that means God’s power | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | General | Boy | Spanish, Latin |
| O | Oswell | Oswell — a charming name with roots in Divine well | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | English, Western |
| O | Oswin | Oswin — a charming name with roots in God’s friend | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | General | Boy | English, Western |
| O | Oswiu | Oswiu — valued for its essence of Divine war | 6 | Venus | Friday | Pink | 6, 15, 24, 33 | Romantic, Responsible, Sympathetic, Warm | General | Boy | English, Western |
| O | Oswyn | Oswyn — carrying the essence of God’s joy | 6 | Venus | Friday | Pink | 6, 15, 24, 33 | Romantic, Responsible, Sympathetic, Warm | General | Boy | English, Western |
| O | Ota | Ota — a unique name that means Fortunate rice field | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | Japanese |
| O | Otadan | Otadan — a unique name that means Spear warrior | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | Native American |
| O | Otaktay | Otaktay — a charming name with roots in Kills many | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | Native American |
| O | Otek | Otek — echoing the idea of Wealthy protector | 6 | Venus | Friday | Pink | 6, 15, 24, 33 | Romantic, Responsible, Sympathetic, Warm | General | Boy | Slavic |
| O | Otello | Otello — a radiant choice that means Prosperous hero | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | Italian, Latin |
| O | Otemar | Otemar — reflecting the spirit of Famous wealth | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | Germanic |
| O | Otey | Otey — evoking the qualities of Wealthy guardian | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | English, Western |
| O | Othell | Othell — celebrated for symbolizing Noble and prosperous | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | English, Western |
| O | Othello | Othello — valued for its essence of Wealthy hero | 6 | Venus | Friday | Pink | 6, 15, 24, 33 | Romantic, Responsible, Sympathetic, Warm | General | Boy | Italian, Latin |
| O | Othiambo | Othiambo — embodying qualities of Born in the evening | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | African |
| O | Othieno | Othieno — a radiant choice that means Born at night | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | African |
| O | Othman | Othman — rooted in tradition, associated with Pure and wise | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | Muslim | Boy | Arabic, Urdu, Islamic |
| O | Othniel | Othniel — a classic choice tied to Strength of God | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | Jewish | Boy | Hebrew |
| O | Otho | Otho — a distinguished name linked to Wealth and fortune | 4 | Rahu (Uranus) | Saturday | Grey | 4, 13, 22, 31 | Organized, Hardworking, Loyal, Trustworthy | General | Boy | Germanic |
| O | Othon | Othon — a classic choice tied to Prosperous ruler | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | Greek |
| O | Otieno | Otieno — a poetic name signifying Born at night | 6 | Venus | Friday | Pink | 6, 15, 24, 33 | Romantic, Responsible, Sympathetic, Warm | General | Boy | African |
| O | Otik | Otik — embodying qualities of Wealth and power | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | Slavic |
| O | Otilio | Otilio — admired as it reflects Prosperous heritage | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | General | Boy | Spanish, Latin |
| O | Otis | Otis — embodying qualities of Wealthy and fortunate | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | English, Western |
| O | Otito | Otito — rooted in tradition, associated with Truth | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | African |
| O | Otitodelichukwu | Otitodelichukwu — evoking the qualities of God is truth | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | African |
| O | Otman | Otman — valued for its essence of Virtuous and pure | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | Muslim | Boy | Arabic, Urdu, Islamic |
| O | Otniel | Otniel — embodying qualities of Lion of God | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | Jewish | Boy | Hebrew |
| O | Oto | Oto — a radiant choice that means Wealth and fortune | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | Germanic |
| O | Otoahhastis | Otoahhastis — loved for the sense of Strong voice | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | General | Boy | Native American |
| O | Otoahnacto | Otoahnacto — carrying the essence of Bold warrior | 4 | Rahu (Uranus) | Saturday | Grey | 4, 13, 22, 31 | Organized, Hardworking, Loyal, Trustworthy | General | Boy | Native American |
| O | Otokar | Otokar — admired as it reflects Wealthy ruler | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | General | Boy | Slavic |
| O | Otoniel | Otoniel — cherished for its connection to Strength of God | 9 | Mars | Tuesday | Maroon | 9, 18, 27, 36 | Visionary, Courageous, Charitable, Generous | Jewish | Boy | Hebrew |
| O | Otse | Otse — celebrated for symbolizing Peaceful one | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | African |
| O | Otskai | Otskai — a graceful name meaning Brave leader | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | Native American |
| O | Ottah | Ottah — admired as it reflects God’s honor | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | African |
| O | Ottakoothan | Ottakoothan — treasured for its meaning: Famous Tamil poet | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | Hindu | Boy | Indian, Sanskrit |
| O | Ottar | Ottar — often chosen for its link with Warrior | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | Norse, Old Norse |
| O | Ottavio | Ottavio — a timeless choice symbolizing Eighth born | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | Italian, Latin |
| O | Ottfried | Ottfried — a unique name that means Peaceful wealth | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | Germanic |
| O | Ottis | Ottis — a radiant choice that means Wealth and fortune | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | English, Western |
| O | Otto | Otto — carrying the essence of Prosperous and wealthy | 7 | Ketu (Neptune) | Monday | Light Green | 7, 16, 25, 34 | Wise, Knowledge-Seeker, Deep Thinker, Introspective | General | Boy | Germanic |
| O | Ottokar | Ottokar — carrying the essence of Wealth protector | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | Germanic |
| O | Ottomar | Ottomar — carrying the essence of Famous wealth | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | Germanic |
| O | Ottway | Ottway — a poetic name signifying Fortunate path | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | English, Western |
| O | Otu | Otu — shining with the meaning of Wealth and power | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | African |
| O | Otus | Otus — a unique name that means Keen-sighted | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | Greek |
| O | Otutodelichukwu | Otutodelichukwu — echoing the idea of God is strength | 1 | Sun | Sunday | Red | 1, 10, 19, 28 | Goal-Oriented, Fearless, Motivator, Pioneering | General | Boy | African |
| O | Otzar | Otzar — echoing the idea of Treasure | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | Jewish | Boy | Hebrew |
| O | Oukounaka | Oukounaka — embodying qualities of Sacred bear | 2 | Moon | Monday | White | 2, 11, 20, 29 | Caring, Patient, Mediator, Supportive | General | Boy | Native American |
| O | Ouni | Ouni — a distinguished name linked to Honest child | 5 | Mercury | Wednesday | Green | 5, 14, 23, 32 | Spontaneous, Traveler, Clever, Adaptable | General | Boy | African |
| O | Ouray | Ouray — evoking the qualities of Arrow | 8 | Saturn | Saturday | Black | 8, 17, 26, 35 | Achiever, Practical, Power-Seeker, Determined | General | Boy | Native American |
| O | Ourson | Ourson — embodying qualities of Little bear | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | General | Boy | French, Latin |
| O | Ouseph | Ouseph — embodying qualities of God increases | 3 | Jupiter | Thursday | Yellow | 3, 12, 21, 30 | Imaginative, Social, Joyful, Expressive | Christian | Boy | Western, English |