| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Noreen | Eleonora | Old Provençal | German, English, Irish | Words: foreign | |
| Nori | Eleonora | Old Provençal | English | Words: foreign | |
| Noriko | Noriko | Japanese | Kanji symbol, Japanese | Words: method, law, rule / child | |
| Norina | Eleonora | Old Provençal | Italian | Words: foreign | |
| Nova | Nova | English | English | the new one | #853 |
| Nova | Nova | English | English | the new one | #32 |
| Novah | Nova | English | English | the new one | #742 |
| Novalee | Nova | English | German, English | the new one | #771 |
| Novalie | Nova | English | Scandinavian | the new one | |
| Novato | Novato | Latin | Italian | | |
| Noyan | Noyan | Unknown | Turkish | | |
| Numa | Numa | Unknown | Arabic | | |
| Nuno | Nuno | Latin | Portuguese | maybe the ninth | |
| Nuño | Nuno | Latin | Spanish | maybe the ninth | |
| Nunzia | Nunzio/Nunzia | Latin | Italian | | |
| Nunzio | Nunzio/Nunzia | Latin | Italian | | |
| Nurana | Nurana | Turkmen | Turkmen | handsome | |
| Nuray | Nuray | Turkish | Turkish, Azerbaijani | bright moon | |
| Nutsa | Nutsa | Unknown | Georgian | | |
| Nya | Nia | Swahili | English | aim, purpose | |
| Nyah | Nia | Swahili | English | aim, purpose | |
| Nyasia | Nyasia | Unknown | English | | |
| Nyla | Nila | Sanskrit | English | dark blue | #227 |
| Nylah | Nila | Sanskrit | English | dark blue | #403 |
| Nyra | Nyra | Unknown | English | | #842 |
| Odalis | Ottilia | Old High German | English | Words: wealth | |
| Odalys | Ottilia | Old High German | Spanish | Words: wealth | |
| Odd | Odd | Old Norse | Scandinavian | point of a weapon | |
| Oddone | Oddone | Old High German | Italian | | |
| Odelia | Ottilia | Old High German | English | Words: wealth | |
| Odeta | Odeta | Albanian | Albanian | Words: blue, sea | |
| Odhrán | Odhrán | Old Irish | Irish | little pale green one | |
| Odilia | Ottilia | Old High German | German | Words: wealth | |
| Odilie | Ottilia | Old High German | German | Words: wealth | |
| Ofentse | Ofentse | Unknown | Zulu | | |
| Ognjen | Ognyan | Bulgarian | Serbo-Croatian | fiery | |
| Ognyan | Ognyan | Bulgarian | Bulgarian | fiery | |
| Oisín | Oisín | Old Irish | Irish | | |
| Oksana | Xenia | Old Greek | Russian | hospitality | |
| Oktay | Oktay | Unknown | Turkish | | |
| Olalla | Eulalio/Eulalia | Old Greek | Spanish | to talk well | |
| Olea | Olea | Scandinavian | Scandinavian | | |
| Oleg | Helge/Helga | Old Norse | Russian | holy, blessed | |
| Olesja | Alesya | Unknown | Slavic | | |
| Olesya | Alesya | Unknown | Russian | | |
| Olga | Helge/Helga | Old Norse | Russian | holy, blessed | |
| Oline | Oline | Scandinavian | Scandinavian | | |
| Olivera | Olivera | Unknown | German | | |
| Ólöf | Ólöf | Old Norse | Icelandic | | |
| Olve | Olve | Unknown | Scandinavian | | |
| Omarion | Omarion | Unknown | English | | |
| Ombeline | Ombeline | Latin | French | Words: shadow | |
| Ombretta | Ombretta | Italian | Italian | | |
| Omer | Omer | Unknown | German | | |
| Omero | Homer | Old Greek | Italian | | |
| Omphile | Omphile | Sesotho | Sesotho | maybe given | |
| Omphile | Omphile | Sesotho | Sesotho | maybe given | |
| Ömür | Ömür | Turkish | Turkish | life span | |
| Onalerona | Onalerona | Unknown | English | maybe God is with us | |
| One | One | Unknown | Frisian | | |
| Onno | One | Unknown | Frisian | | |
| Onofrio | Onofrio | Old Greek | Italian | | |
| Onyx | Onyx | Unknown | English | | #406 |
| Oona | Une | Old Norse | Finnish | Words: be satisfied, be happy | |
| Oran | Odhrán | Old Irish | Irish | little pale green one | |
| Orçun | Orçun | Unknown | Turkish | | |
| Orhan | Orhan | Turkish | Turkish | | |
| Oria | Oria | Latin | Italian | the golden | |
| Oriana | Oriana | Old French | Italian, English | Words: gold | |
| Oriane | Oriana | Old French | French | Words: gold | |
| Orianne | Oriana | Old French | French | Words: gold | |
| Orietta | Oria | Latin | Italian | the golden | |
| Orinda | Orinda | Unknown | English | | |
| Orio | Orio | Unknown | Italian | | |
| Oriol | Oriol | Latin | Catalan | Words: golden | |
| Orla | Orla | Old Irish | English, Irish | golden princess | |
| Orlagh | Orla | Old Irish | Irish | golden princess | |
| Orlaith | Orla | Old Irish | Irish | golden princess | |
| Oronzio | Oronzo | Unknown | Italian | | |
| Oronzo | Oronzo | Unknown | Italian | | |
| Orsino | Ursino | Latin | Italian | Words: bear | |
| Orso | Urs | Latin | Italian | the bear | |
| Orsola | Ursula | Latin | Italian | little bear | |
| Orsolya | Ursula | Latin | Hungarian | little bear | |
| Osama | Usama | Arabic | Arabic | the lion | |
| Osamu | Osamu | Japanese | Kanji symbol, Japanese | Words: study, repair, cultivate | |
| Osman | Osman | Arabic | Malay, Turkish | bustard fledgling | #981 |
| Ossian | Oisín | Old Irish | English | | |
| Ota | Ota | Unknown | | | |
| Othilie | Ottilia | Old High German | French | Words: wealth | |
| Otso | Otso | Finnish | Finnish | bear | |
| Ottilia | Ottilia | Old High German | German, Latinized | Words: wealth | |
| Ottilie | Ottilia | Old High German | German | Words: wealth | |
| Ouafa | Ouafa | Unknown | Arabic | | |
| Ousmane | Osman | Arabic | French | bustard fledgling | |
| Oussama | Usama | Arabic | French | the lion | |
| Owen | Eoghan | Celtic | English, Irish | Words: yew | |
| Oxana | Xenia | Old Greek | Russian | hospitality | |
| Özge | Özge | Turkish | Turkish | | |
| Pacifico | Pacifico | Latin | Spanish, Tagalog | the pacific, the peaceful | |
