| Name | Meaning | Origins | Gender | Popularity (last 10y) | |
|---|---|---|---|---|---|
| Oleana | Likely 'light' or 'torch' from the Greek Helena; alternatively a feminine form of Ole in Scandinavian usage. | Greek, Scandinavian | Girl | — | |
| Oleanthe | Olive flower / flower of the olive | Greek, Latin | Girl | — | |
| Oleina | Generally associated with 'light' or 'torch' (from Helen/Helena); in some interpretations it may also echo 'olive' (from Latin olea) | Greek | Girl | — | |
| Olethea | Healer | Greek | Girl | — | |
| Olethia | Destruction, ruin | Greek | Girl | — | |
| Olexei | Defender, protector (of men) | Greek | Boy | — | |
| Olexey | Defender of men; protector | Greek | Boy | — | |
| Olimpe | Of Mount Olympus; 'from Olympus', often interpreted as 'heavenly' or 'exalted' | Greek | Girl | — | |
| Olimpiah | From Mount Olympus; 'of Olympus', associated with the gods/heavenly | Greek | Girl | — | |
| Olimpias | Belonging to Mount Olympus; heavenly, divine. | Greek | Girl | — | |
| Olyena | Bright, shining light; torch | Greek | Girl | — | |
| Olympas | Of Mount Olympus - associated with Olympus; high, exalted or heavenly | Greek | Boy | — | |
| Olympea | From Mount Olympus; heavenly, divine | Greek | Girl | — | |
| Olympiah | Of Mount Olympus; divine/heavenly | Greek | Girl | — | |
| Olympias | Of Mount Olympus; belonging to Olympus | Greek | Girl | — | |
| Olympie | From Mount Olympus; 'of Olympus' - associated with the Greek gods; heavenly. | Greek | Girl | — | |
| Olympiodorus | Gift of (Mount) Olympus | Greek | Boy | — | |
| Olympy | From Mount Olympus; associated with the Greek gods | Greek | Girl | — | |
| Olympya | Of Mount Olympus; pertaining to the home of the Greek gods; 'of Olympus' or 'heavenly'. | Greek | Girl | — | |
| Olympyah | Of Mount Olympus; 'of the gods' or 'heavenly'. | Greek | Girl | — | |
| Omphale | Name of a mythological Lydian queen; etymology uncertain, possibly related to Greek omphalos ('navel' or 'center'). | Greek | Girl | — | |
| Onesimos | Useful, profitable, beneficial | Greek | Boy | — | |
| Onesimous | Useful, profitable, helpful, beneficial | Greek | Boy | — | |
| Onesiphoros | 'bringing profit' or 'bringing help' (benefactor) | Greek | Boy | — | |
| Onesiphorus | Bringer of profit; profitable one | Greek | Boy | — | |
| Onophrius | ‘eternally good’ or ‘perfect one’ (literally 'he who is continually good') | Coptic, Greek | Boy | — | |
| Onufrij | Eternally good; continually fortunate | Greek | Boy | — | |
| Onufriy | He who is perfect / perfect being | Greek | Boy | — | |
| Onufryj | From ancient Egyptian wn-nfr: "the perfect one" or "he who is continually good" | Greek | Boy | — | |
| Opalyne | Derived from the opal gemstone - 'precious stone', often associated with iridescence and shifting colors | English, Greek | Girl | — | |
| Opelie | Help, aid, benefit | Greek | Girl | — | |
| Ophelos | Help, benefit, advantage | Greek | Boy | — | |
| Ophion | Serpent; mythic serpent-king | Greek | Boy | — | |
| Orea | Beautiful; also mountain-associated; occasionally interpreted as 'golden' | Greek | Girl | — | |
| Oreias | Mountain nymph; 'of the mountains' | Greek | Girl | — | |
| Orena | Possibly "light" (from Hebrew Or/Orna) or "peace" (from Greek/Slavic Irene); sometimes linked to Hebrew Oren meaning "pine/ash". | Greek, Hebrew, Slavic | Girl | — | |
| Oresta | Mountain dweller / from the mountains | Greek | Girl | — | |
| Orithye | Likely "mountain maiden" or "she from the mountains" (derived from Greek elements related to "mountain") | Greek | Girl | — | |
| Orithyia | Mountain-born / woman of the mountains | Greek | Girl | — | |
| Orithyie | Name of a mythological Athenian princess (abducted by Boreas); etymology uncertain - often interpreted loosely as related to mountains or rising/winds. | Greek | Girl | — | |
| Ornice | Uncertain; possible interpretations include 'little bird', 'golden', or a modern invented name without an established historical meaning | Greek | Girl | — | |
| Orphe | Derived from Orpheus, the legendary Greek musician and poet; associated with music, poetry and the underworld. Etymology uncertain (possibly related to a Greek word for 'darkness'). | Greek | Boy | — | |
| Orpheus | Possibly 'darkness' or 'night' (from Greek orphnē 'darkness'); name of the legendary musician Orpheus. | Greek | Boy | — | |
| Orphy | Derived from Orpheus, the legendary Greek musician and poet; associated with music, enchantment and (etymologically uncertain) darkness. | Greek | Boy | — | |
| Orthros | Dawn, morning; also the Matins (early morning prayer) service in Eastern Christianity | Greek | Boy | — | |
| Ortygia | From Greek 'ortyx' meaning 'quail'; name of a mythological nymph and an island (Ortigia/Ortygia). | Greek | Girl | — | |
| Otrera | Queen of the Amazons; mythological Amazonian leader | Greek | Girl | — | |
| Otus | Name of a mythological giant; etymologically linked to 'ear'. | Greek | Boy | — | |
| Pachomios | Etymology uncertain; an Egyptian/Coptic name later Hellenized. Exact original meaning is not definitively known. | Greek | Boy | — | |
| Paisios | Derived from 'pais' meaning 'child' - 'child' or 'childlike' | Greek | Boy | — |
Aggregated births across United States, United Kingdom, France, Germany for every Greek-origin name in our dataset.
