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Boy Names Starting with O

Boy names starting with O are on the way up, with old-timer Oliver and on-trend Owen leading the charge.

In Britain, the O initial is out on top for both boys and girls at the moment, with Olivia atop the girls’ list and Oliver joined near the top of the boys’ chart by amiable Oscar. Along with Oliver, other O names for boys in the US Top 300 include Owen, Oscar, Omar, and Orion.

It’s true that on the whole we prefer our o’s at the end of boys’ names (as in popular Berry favorites Milo, Leo and Hugo), but who’s to say that you can’t have both? Otto, Orlando, and Othello all rank in the Top 1000 baby names here on Nameberry… or how about Oslo, Orsino, or Octavio?

Browse our full collection of boy names beginning with O here. The top names below rank among the current US Top 1000 Baby Names and are ordered by popularity. Unique names rank below the Top 1000 and are listed alphabetically.

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See Unique Boy Names Starting with O

Top Boy Names Starting with O

  • Oliver

    Oliver derives from Olivier, the Norman French variation of the Ancient Germanic name Alfher or the Old Norse Aleifr, which comes from Olaf. Olivier emerged as the dominant spelling for its... Read More 

  • Owen

    Owen was derived from two names—the Welsh Owain and the Celtic Eoghan. Each are connected to Eugene, which ultimately came from the Greek word eugenes, comprised of the elements... Read More 

  • Oscar

    Oscar has Irish and Norse roots—Norse Oscar comes from the Old English Osgar, a variation of the Old Norse name Ásgeirr. The Irish form was derived from the Gaelic elements os, meaning... Read More 

  • Omar

    Omar has a perfect mix of exoticism and familiarity, with the additional plus of a strong, open initial O. Commonly used among Muslim families, Omar was long associated with twelfth century... Read More 

  • Orion

    Orion is a rising star, with both mythical and celestial overtones.

    The Greek mythological Orion was the legendary hunter who pursued the seven daughters of Atlas, was slain by the... Read More 

  • Odin

    Odin is the name of the supreme Norse god of art, culture, wisdom and law -- who was handsome, charming and eloquent into the bargain. The name projects a good measure of strength and power and... Read More 

  • Otto

    Cutting-edge parents have revived this German name a la Oscar.

    Like most German names, Otto fell out of favor during and... Read More 

  • Oakley

    As sturdy as Oak, with deeper roots. For males, it's been on the rise in recent years.Read More 

  • Omari

    This name, like Omar and Amari, has been in the US Top 1000 for many years. After taking a downturn in 2008, it's now again on the upswing. Actor Omari Hardwick keeps it in the public eye.Read More 

  • Orlando

    Orlando, the ornate Italianate twist on the dated Roland, with a literary heritage stretching back to Shakespeare and before, has appealing book-ended o's, and is open to combination with almost... Read More