Hello and welcome to our list of unusual baby boy names beginning with O! The letter O is a very special and rare start to a name that we don’t often come across in the US or UK. It is more common within Ireland and Scandinavian countries to have names starting with O. Either way, we had a lot of fun compiling this list for you and we even put together a Top 10 of our teams favorites!

Did you already choose a baby name for your child from this list? We would love to know what you chose! You can let us know in the comments or send us an email. Your feedback also let’s us determine the overall popularity of each name and helps us improve our service.

This list of unusual baby boy names beginning with O is in alphabetic order and so far we have over 400! The list keeps growing from day to day so make sure you keep coming back to find new and exciting additions.

Have you already tried our Baby Name Generator? It is free and easy to use so why not give it a go!

So with no more time to waste, here is our list of ‘Unusual Baby Boy Names Beginning With O’ including our Top 10 picks!

Our Top 10 Unusual Baby Boy Names Beginning With O

  1. Ozias
  2. Otso
  3. Ory
  4. Orsin
  5. Orlo
  6. Olo
  7. Olave
  8. Oedipus
  9. Omry
  10. O’fallon

List of Unusual Baby Boy Names Beginning With O

With over 400 to choose from, we believe the ideal name for your little man is just waiting to be found by you. Be sure to make a note of the ones that really stand out to you incase you lose it!

Wishing you all the best with the birth and a happy, healthy future for your little baby boy!

O’brianOedipusOnniOsiel
O’bryanOengusOnofreOsier
O’callahanOffieOnofredoOsip
O’caseyOgdanOnslowOsiris
O’connorOgdenOnsloweOskar
O’donnellOgdonOntarioOskar / oscar
O’donovanOgierOnyxOskarê/ oscar
O’fallonOgunOoinnOskari
O’gradyOhanOomerOsker
O’haraOhannOphirOsler
O’keefeOhannesOptimusOslo
O’nealOhariOrOsman
O’neallOilibhearOr-chayimOsmand
O’neelOisinOradOsmanek
O’neilOisínOralOsmen
O’neillOivaOranOsment
O’reillyOjaiOratioOsmin
O’rileyOjoreOrazioOsmo
O’ryanOkelloOrbanOsmond
O’shaneOkesOrchardOsmonde
O’shayOkeyOrcusOsmont
O’sheaOkkoOrelOsmund
O’sullivanOkoroOrenOsmunde
OakesOlOrenthalOsmundo
OakieOlaOreoOsqui
OaklandOlafOresteOsquitar
OakleaOlaffOrestesOsric
OakleeOlafurOrevOsrick
OakleighOlamilekanOrfeoOssian
OaklieOlanOrinOssie
OaklyOlandOriolOssin
OaksOlavOrisOstadar
OanOlaveOrisonOsvald
OasisOlaviOrlanOsvaldo
ObadiaOlayOrlandOswald
ObadiahOleOrlanditoOswaldo
ObadiasOleanderOrlandoOswall
ObadiusOlefOrleyOswell
ObamaOlegOrlinOswin
ObanOlekOrloOswold
ObbiOlenOrlondoOszkar
ObbieOlevOrmandOtek
ObeOleyOrmondOtello
ObedOlezkaOrnanOtfried
ObediaOlierOrnetteOtha
ObediahOlimiosOrniOthão
OberenOlimpioOrnoOthel
ObéronOlimpoOroOthello
OberronOlinOronOthmar
OberynOlinnOrpheusOthniel
ObiOliverOrranOtho
ObieOliverioOrrelOthon
ObrianOlivianOrrenOtieno
ObrienOlivierOrrieOtik
ObsidianOlivieroOrrinOtilio
ObyOlivierosOrrisOtis
OceanusOliwierOrsenOtman
OctaveOliwjerOrsinOtmar
OctaveusOlleOrsinoOto
OctavianOllierOrsisOton
OctaviannoOllivanderOrsoOtso
OctavinoOlliverOrsonOtt
OctavioOllivierOrsuOttaviano
OctaviónOllyverOrtegaOttavio
OctaviousOloOrtegeOttis
OctaviusOlofOrtegoOttmar
OctavoOlovOrtonOtto
OctavousOlsenOrvalOttocar
OctavusOlsonOrvelOttomar
OctovioOlufOrvelleOtton
OdaleOlufemiOrvilOttone
OdallOlugbengaOrvilleOuen
OdanOluwafemiOrvinOurson
OdayleOluwatobilobaOrvisOvadiah
OddieOlvierOrwellOvadya
OddinOlympioOryOved
OddonOlympiosOryonOvid
OdelOlymposOsbaldoOvila
OdemarOlympusOsbernOwain
OdenOlynOsbertOwais
OdeyOlynnOsbornOwens
OdhranOlyverOsborneOwin
OdhránOmOsbournOwl
OdiOmaireOsbourneOwyn
OdieOmarOsburnOx
OdilioOmarionOsburneOxford
OdilonOmarrOscarOy
OdilónOmaviOscaritoOyibo
OdinOmerOsckarOz
OdinnOmeroOseiOzanne
OdionOmmarOseiasOzborn
OdisOmmoOsgarOzborne
OdissanOmniOsgoodOzcar
OdoOmreyOshaeOzgur
OdomarOmriOshaiOzi
OdonOmryOshaunOzias
OdönOnealOsheaOzie
OdranOneallOsheenOziel
OdusOneilOsherOzni
OdyOneillOshinOzuru
OdysséeOnekOshunOzymandias
OdysseusOnesimeOsianOzzi
OeberonOnesimusOsiasOzzie
OeberronOnfroiOsíasOzzy

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Remember you can also download The Ultimate Boy Names List HERE to refer to whenever you want! See you soon!