| Name | Meaning | Origins | Gender | Popularity (last 10y) | |
|---|---|---|---|---|---|
| Nyeva | A modern variant of Neva/Neve; often interpreted as 'snow', 'bright', or 'new' depending on root | Irish | Girl | — | |
| Nyeve | Bright, radiant | Irish | Girl | — | |
| nyles | Derived from Niall, commonly interpreted as "champion" (also variously given as "passionate" or "cloud") | Irish | Boy | — | |
| Nyral | Uncertain - modern/coined name. Possible senses include 'new' or associations with roots meaning 'field' or 'unique' depending on influence | Irish | Unisex | — | |
| O’Shea | Hawk-like; stately | Irish | Boy | — | |
| Oconal | Descendant of Conall (Conall ≈ "strong wolf" or "high valor") | Irish | Boy | — | |
| Oconar | Descendant/variant of Conchobhar; traditionally linked to 'lover of hounds' or 'hound-whelp.' | Irish | Boy | — | |
| Oconel | Descendant of Conall; Conall is commonly interpreted as 'strong wolf' or 'high valor'. | Irish | Boy | — | |
| Oconer | Descendant of Conchobhar - 'lover of hounds' (hound-lover) | Irish | Boy | — | |
| Oconnar | Descendant of Conchobhar (literally 'lover of hounds' or 'hound-desiring') | Irish | Boy | — | |
| Oconnelle | Descendant of Conall; Conall likely means 'strong as a wolf' (from Old Irish elements for 'hound/wolf' and 'valor'). | Irish | Unisex | — | |
| Oconor | Descendant of Conchobhar - Conchobhar meaning 'lover of hounds' | Irish | Boy | — | |
| Odeane | Derived from Deane/Dean: 'valley' or occupational 'church official'; sometimes used as a feminine form of Deanna. | English, Irish | Girl | — | |
| Odharnait | Likely a feminine diminutive of Odhar/Ódhar, meaning "little pale/dun(-haired) one" | Irish | Girl | — | |
| Odran | Little pale / dun-colored one | Irish | Boy | — | |
| Odron | Little dun- or pale-colored one (from odhar 'dun, sallow' + diminutive -án) | Irish | Boy | — | |
| Oenghus | From Old Irish elements meaning 'one' + 'choice/strength' - 'single choice' or 'unique strength' | Gaelic, Irish | Boy | — | |
| Oengus | 'One strength' or 'unique strength' (from óen = one + gus = strength/vigor) | Gaelic, Irish | Boy | — | |
| Og | Young; youth | Irish | Boy | — | |
| Ohara | Irish: 'descendant of Eaghra' (clan name). Japanese: 'large plain' or 'big field'. | Irish, Japanese | Girl | — | |
| Oidhche | Night | Irish, Scottish Gaelic | Girl | — | |
| oilbe | Bright, white | Irish | Unisex | — | |
| Oilbhe | Possibly 'rock' or 'white' - exact etymology uncertain | Irish | Unisex | — | |
| Oilell | Uncertain - an Old Irish personal name borne by early/legendary figures; exact meaning is unclear. | Irish | Boy | — | |
| Oilibhear | Olive tree | French, Irish | Boy | — | |
| Oisean | Little deer (diminutive of Irish 'os' meaning 'deer') | Irish | Boy | — | |
| Oistin | Derived from Old Norse elements often interpreted as 'ey' (island) + 'steinn' (stone) - 'island stone'. | Irish | Boy | — | |
| Oisyn | Little deer | Irish | Boy | — | |
| Oneale | Descendant of Niall; Niall is commonly interpreted as 'champion' (occasionally glossed as 'cloud'). | Irish | Boy | — | |
| Oneel | Descendant of Niall; Niall commonly interpreted as 'champion' or 'passionate/cloud' | Irish | Boy | — | |
| Oneile | Descendant of Niall; Niall is often interpreted as 'champion' or 'passionate'. | Irish | Boy | — | |
| Oola | Varies by origin: possibly 'apple(s)' in Irish contexts; alternatively a short form of Ulla/Ula with Germanic roots (associated with heritage/rule or will). | Germanic, Irish, Scandinavian | Girl | — | |
| Oram | Varies by origin: from Old Norse 'Ormr' meaning 'serpent/dragon'; alternatively a surname/place-name origin denoting a dweller by a ridge, shore, or riverbank. | English, Irish, Norse, Scottish | Boy | — | |
| Orey | Uncertain; possibly "my light" (if derived from Hebrew 'Ori') or a family/surname-derived name | Irish | Unisex | — | |
| Orlaithe | "golden princess" (from Irish ór = gold + flaith = ruler/princess) | Irish | Girl | — | |
| Ormond | From East Munster (placename) | Irish | Boy | — | |
| Ormonde | From East Munster (a region in Ireland) | Irish | Boy | — | |
| Ornan | Biblical Hebrew name (meaning uncertain); in Gaelic contexts related to Oran, 'little pale one'. | Gaelic, Hebrew, Irish | Boy | — | |
| Ornora | Honor; honorable | Irish | Girl | — | |
| Orny | A short form or pet name for names beginning with 'Or-'. Associated senses: 'little pale one' (from Irish Odhrán) or 'light' (from Hebrew Or). | English, Gaelic, Hebrew, Irish | Boy | — | |
| Orvan | Uncertain - may be a form related to Old Norse 'Orvar' ('arrow') or to Gaelic 'Oran' (related personal name); exact origin is ambiguous. | Irish | Boy | — | |
| Oscar De | Likely 'deer lover' or 'friend of deer' | Irish | Boy | — | |
| Oscer | Possibly 'deer‑friend' (Gaelic) or 'god‑spear' (Old Norse) | Irish, Norse | Boy | — | |
| Osckar | Likely 'deer friend' (from Gaelic) or, by Old Norse influence, 'god-spear' | Irish, Norse | Boy | — | |
| Oshaine | God is gracious | English, Irish | Boy | — | |
| Oshayne | Derived from Seán/John - "God is gracious" | Irish | Boy | — | |
| Osheen | Little deer (fawn) | Irish | Boy | — | |
| Osku | Diminutive of Oskari; associated with 'divine spear' (Old Norse) or 'deer friend' (Gaelic). | Finnish, Irish | Boy | — | |
| Ossie | Pet form of names meaning 'god' (Old English Os-) or 'little deer' (Irish Oisín) | English, Irish | Boy | — | |
| Ossín | Little deer; fawn | Irish | Boy | — |
Aggregated births across Ireland, United Kingdom, United States, Australia for every Irish-origin name in our dataset.
