Boy names ending in O are trendsetters, offering a sound that’s unexpected and fun amid reams of names ending in a consonant.
How do we know they’re style-forward? O-ending names are always among the most popular names on Nameberry. This is a good indicator of what parents-to-be are interested in now, and which names are about to get more popular in real life.
At the moment there are four O-ending names in our twenty most-viewed names: Hugo, Arlo, Otto, and Milo. Also in our Top 100 are Theo, Elio, Leo, Cosmo, Nico, and Mateo, as well as Beau which ends in the same sound.
However, in the latest US charts there were only four O-ending names in the whole Top 100: Mateo, Leo, Santiago, and Leonardo (plus Beau again). Most are on a rising streak, and we predict baby boy names ending in O will only keep getting more popular in the next few years.
As you might guess from the names above, many of these names come from Spanish and Italian. There are also options from Portuguese, Finnish, Greek, Japanese, Hawaiian and other languages across the globe — names with an O ending often make great culture-crossing choices that travel easily.
Here’s our pick of the best boy names ending in O to suit every style, from much-loved favorites to unique options.
The other O-ending names in the Top 500 are mainly of Spanish and Italian origin, with a few exceptions like Arlo and Otto. In order of popularity, they are:
Heart1MateoChevron - RightHeart2LeoChevron - RightHeart3SantiagoChevron - RightHeart4LeonardoChevron - RightHeart5DiegoChevron - RightHeart6MiloChevron - RightHeart7LorenzoChevron - RightHeart8EnzoChevron - RightHeart9ThiagoChevron - RightHeart10TheoChevron - RightHeart11MatteoChevron - RightHeart12EmilianoChevron - RightHeart13AntonioChevron - RightHeart14ArloChevron - RightHeart15AlejandroChevron - RightHeart16EmilioChevron - RightHeart17NicoChevron - RightHeart18KairoChevron - RightHeart19NikoChevron - RightHeart20MaximilianoChevron - RightHeart21FranciscoChevron - RightHeart22AngeloChevron - RightHeart23CairoChevron - RightHeart24OttoChevron - RightHeart25EduardoChevron - RightHeart26RicardoChevron - RightHeart27MarioChevron - RightHeart28RomeoChevron - RightHeart29FernandoChevron - RightHeart30SergioChevron - RightHeart31MarcoChevron - RightHeart32ApolloChevron - RightHeart33PabloChevron - RightHeart34SantinoChevron - RightHeart35LucianoChevron - RightHeart36PedroChevron - RightHeart37HugoChevron - RightHeart38BoChevron - Right
Here are Spanish, Italian and Portuguese names that have deep roots, but are not overused. They could honor heritage, or be an alternative to the English equivalent, like Marco instead of Mark. Many are more popular in their home country, like Francesco: in the Top 5 in Italy, but below the Top 1000 in the US.
HeartAlessandroChevron - RightHeartAlonsoChevron - RightHeartCarmeloChevron - RightHeartDiegoChevron - RightHeartFrancescoChevron - RightHeartGiorgioChevron - RightHeartIgnacioChevron - RightHeartLeonardoChevron - RightHeartMarcoChevron - RightHeartRenatoChevron - RightHeartSergioChevron - RightHeartTadeoChevron - RightHeartTeoChevron - RightHeartVincenzoChevron - Right
HeartBoChevron - RightHeartBrunoChevron - RightHeartCosmoChevron - RightHeartEeroChevron - RightHeartGioChevron - RightHeartHugoChevron - RightHeartJagoChevron - RightHeartKittoChevron - RightHeartLudoChevron - RightHeartMikkoChevron - RightHeartMiloChevron - RightHeartMungoChevron - RightHeartNikoChevron - RightHeartOttoChevron - RightHeartRoccoChevron - RightHeartRolloChevron - RightHeartSholtoChevron - RightHeartTheoChevron - RightHeartVitoChevron - RightHeartZukoChevron - Right
HeartAurelioChevron - RightHeartBenicioChevron - RightHeartCiceroChevron - RightHeartCostelloChevron - RightHeartCristianoChevron - RightHeartDracoChevron - RightHeartEmilianoChevron - RightHeartFlorentinoChevron - RightHeartGalileoChevron - RightHeartHoratioChevron - RightHeartIndalecioChevron - RightHeartLucianoChevron - RightHeartMalvolioChevron - RightHeartMaximilianoChevron - RightHeartNetunoChevron - RightHeartValentinoChevron - Right
HeartAlessioChevron - RightHeartArloChevron - RightHeartCaioChevron - RightHeartElioChevron - RightHeartEnzoChevron - RightHeartGinoChevron - RightHeartHiroChevron - RightHeartKyloChevron - RightHeartLeandroChevron - RightHeartLivioChevron - RightHeartMakaioChevron - RightHeartMateoChevron - RightHeartMatteoChevron - RightHeartRenzoChevron - RightHeartSantiagoChevron - RightHeartSantinoChevron - RightHeartThiagoChevron - RightHeartTimeoChevron - RightHeartViggoChevron - RightHeartZenoChevron - Right
Aeko (Ammika Harris and Chris Brown)
Apollo (Gwen Stefani)
Brando (Jacqueline Wood & Elan Ruspoli)
Caruso (Sebastian Maniscalo)
Cosmo (Scarlett Johansson)
Francisco (Lin Manuel Miranda)
Fuego (Robin Thicke’s son Julian Fuego)
Kenzo (Kevin Hart)
Laszlo (Pete Wentz’s son Saint Laszlo)
Lorenzo and Angelo (Nicole “Snooki” Polizzi)
Michelangelo (Tom and Giovanna Fletcher’s son Buzz Michelangelo)
Monaco (Jeezy)
Rocco (Madonna)
Romeo (David and Victoria Beckham, Alec and Hilaria Baldwin)
Santino (Mario Lopez)
Vittorio (Hope Solo and Jerramy Stevens)
Many of these names are used for girls as well as boys. For example Rio was about 75% male, 25% female in the latest baby name statistics, while Chicago is better known as a girl name, thanks to Kim and Kanye — but would be cool for boys too.
HeartAlamoChevron - RightHeartCairoChevron - RightHeartChicagoChevron - RightHeartLoretoChevron - RightHeartMonacoChevron - RightHeartOsloChevron - RightHeartPalermoChevron - RightHeartRenoChevron - RightHeartRioChevron - Right
HeartAmadoChevron - RightHeartAyoChevron - RightHeartBardoChevron - RightHeartHaloChevron - RightHeartHeroChevron - RightHeartIndigoChevron - RightHeartJerichoChevron - RightHeartJethroChevron - RightHeartSoloChevron - RightHeartTaoChevron - RightHeartThandoChevron - RightHeartToivoChevron - Right
HeartArrowChevron - RightHeartBeauChevron - RightHeartCrusoeChevron - RightHeartDevereauxChevron - RightHeartHarlowChevron - RightHeartJoeChevron - RightHeartMarceauChevron - RightHeartMonroeChevron - RightHeartPharoahChevron - RightHeartPoeChevron - RightHeartRoscoeChevron - RightHeartShilohChevron - RightHeartSnowChevron - RightHeartSparrowChevron - RightHeartThoreauChevron - RightHeartWoodrowChevron - Right
For more great options, see our list of Best Boy Names Ending in O — or for something a bit different, check out our Unique Boy Names Ending in O.
Clare Green has been writing for Nameberry since 2015, covering everything from names peaking right now to feminist baby names, and keeping up-to-date with international baby name rankings. Her work has featured in publications such as The Independent and HuffPost. Clare has a background in linguistics and librarianship, and recently completed an MA dissertation researching names in multilingual families. She lives in England with her husband and son. You can reach her at [email protected]
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