The O Names

Baby names that begin or end with the letter o have long been particularly cool, especially (though there are a few feminine selections) for boys. The options, of course, range far beyond those offered here, especially considering the entire world of Latinate baby names out there, but this group should give you a pretty good start.

  • Reo

    Gender: M LoveDislike

    See RIO. Read More 

  • Rio

    Gender: M LoveDislike

    Rio is a reductive ranchero place-name with an attractive Tex-Mex lilt. No Doubt's Tom Dumont has a son named Rio Atticus.

    Also a South American place name, and associated with the... Read More 

  • Rocco

    Gender: M LoveDislike

    Madonna did much to polish up the image of this old-neighborhood Italian choice when she picked it for her son with British director Guy Ritchie. It now feels much more mainstream, sharing the... Read More 

  • Rodrigo

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    Rhythmically appealing international spin on the stiff original. Read More 

  • Rollo

    Gender: M LoveDislike

    Rollo is a livelier, roly-poly, o-ending version of Roland.

    Although it sounds modern, Rollo actually was seen regularly on Latin documents in the Middle Ages, though not heard in... Read More 

  • Scorpio

    Gender: M LoveDislike

    Of all the astrological names —think Leo, Aries, Gemini— Scorpio probably has the most dramatically potent presence, which could prove something of a burden to a young boy. ... Read More 

  • Sergio

    Gender: M LoveDislike

    Widely heard in both Italian and Spanish households, it is most identified with spaghetti western director Sergio Leone. Read More 

  • Stefano

    Gender: M LoveDislike

    As commonly heard in Rome, Italy, as Steve is in Rome, New York. With the accent on the first syllable, Stefano has a lot of seductive charm.Read More 

  • Taddeo

    Gender: M LoveDislike

    A particularly charming spin on the original, as is the Spanish Tadeo. It debuted in the US Top 1000 in 2016.Read More 

  • Theo

    Gender: M LoveDislike

    Many modern parents use Theo as the short form for Theodore rather than the dated Ted--including some celebs, such as Dallas Bryce Howard-- but others bypass the Grandpa name Theodore entirely and... Read More 

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