For baby boy names that start with the letter O, we’ve got hundreds of outstanding options—from Odin to Owen.
| Names | Origin | Meaning |
|---|---|---|
| Owen | There’s just something about Owen that sounds sweet and likeable. Another vintage name that’s now back in vogue, Owen is… | |
| Oliver | Brought to England by the Normans, the name Oliver has origins in the French name Olivier and dates back to the time of Charlemagne… | |
| Oscar | English: | God”s spear |
| Omar | Arabic: | Life or thriving, long-living |
| Otis | German: | Wealthy; derivation of Otto |
| Orlando | From the Shakespearean play As You Like It | |
| Odin | Norse: | A chief deity of Norse mythology, Odin is the god of war and death, poetry and culture. |
| Oz | English Origin | Powerful, courageous |
| Otto | German: | Wealthy; a modern form of Odo used in numerous countries |
| Octavius | Latin: | Eighth |
| Olly | ||
| Octavio | Spanish: | Eighth |
| Obadiah | Hebrew: | Servant of God; a minor Old Testament prophet |
| Oswald | From the Shakespearean play King Lear | |
| Olaf | Danish Origin | |
| Orton | English: | From the shore settlement or town; a surname |
| Oriel | Russian: | Eagle. |
| Odell | English: | Of the valley, or an old English place name and surname meaning woad hill; Woad is an Old World plant formerly grown for… |
| Orville | English Origin | Gold town |
| Oren | Gaelic: | Pale-skinned |
| Oswin | English: | God”s friend |
| Osmond | English: | Divine protector |
| Oliverio | Spanish Origin | |
| Omarr | African: | Thriving, long life (Swahili) |
| Ommar | Arabic: | Spelling variation of Omar |
| Octavian | Latin: | Eighth |
| Odgar | Welsh: | Legendary son of Aedd |
| Odhran | Irish: | Little pale green one |
| Odilo | Teutonic: | Rich in battle |
| Odion | African: | First child of the twins |
| Odysseus | Greek: | Wrathful; the clever and resourceful mythological hero of Homer”s epic The Odyssey. |
| Oedipus | Greek: | Swollen foot; Oedipus was the king of Thebes in Greek mythology who unknowingly killed his father and married his mother… |
| Oenomaus | Greek: | Son of Ares |
| Ogilhinn | Scottish: | From the high peak |
| Ola | A version of the strong and hearty Olaf, Ola lacks the ferocity and masculinity of the full-versioned original. | |
| Oldrich | Czech: | One with riches and power |
| Oleg | Russian: | Holy |
| Oles | Polish: | Polish form of Alexander defends mankind |
| Om | Norse: | Father of Idunn |
| Omari | African: | God the highest (Swahili) |
| Omri | Hebrew: | Sheaves of grain |
| Ondyaw | Welsh: | Legendary son of a French Duke |
| Onofredo | Italian: | Peaceful strength; variant of Humphrey |
| Onslow | English: | From the zealous one”s hill |
| Ony | Russian: | Eagle. |
| Ophion | Greek: | A serpent |
| Oral | Russian: | Eagle |
| Orel | Russian: | Eagle |
| Oreta | Greek: | Virtue, the Greek concept of striving for excellence in all aspects of one”s life; variant of Arete |
| Orik | English: | From the ancient oak tree |
| Oringo | African: | He who likes to hunt |
| Orion | Greek: | Son of fire, dawning; The mythological Orion was a mighty hunter and son of Poseidon. The constellation Orion contains three… |
| Orpheus | Greek: | A great musician and poet of Greek myth, Orpheus was greatly in love with his wife Eurydice, whom he lost twice to death… |
| Orrick | English: | From the ancient oak tree |
| Osaze | Egyptian: | Loved by God |
| Osborn | English: | Divine bear |
| Osiris | Egyptian: | God of the dead and the underworld; Osiris is regarded as the king who watches over the nether world and is rejuvenated in… |
| Osmar | English: | Divinely glorious |
| Osric | From the Shakespearean play Hamlet | |
| Osrid | English: | Divine counselor |