1770+ Boy Names Ending in O

Zero has been documented as a given name before, but it's largely familiar as a stage name (such as Zero Mostel, born Samuel Joel Mostel) and comic book and anime characters.

About 100 baby boys were named Lucio in the US last year, a number we expect to increase with the growing popularity of all names in the Lu family. It's a family united by sound, with three main branches.

A place name from Venezuela believed to come from an indigenous word for wind, this can make an innovative choice for a child of either sex.

Rhythmic route to the nickname Cal. This musical moniker is another great example of a traditionally feminine name that could easily go masculine.

Traditionally given to the ninth-born son, which is a rarity nowadays.

More often spelled Romolo,a name sometimes heard in the Hispanic and Italian communities; this version was used by singer Monica.

A river (in Italy), a writer (Bronson), a Teletubby: the Bo of the new millennium.

With the ubiquitous Max heard at every playground across the country, international versions have been gaining traction in an attempt to provide a fresh avenue to the highly sought nickname. This Spanish iteration has been in the US Top 1000 for most of the 21st century. This is one of many Spanish baby names with international power.

Better than Lenny, not as good as Leo, and tightly tied to Tonight Show host Jay Leno.

Popular President Franklin Delano Roosevelt inspired a brief fashion for this as a first name in the 1940s; almost never heard today.

Solo is a singular word name with special meaning for Star Wars fans. Equally appropriate for girls and boys, it works especially well in the middle.

Several spelling variations of this name feel stylish for either a boy or girl, including Marlo, Marlow, and Marlowe. This spelling in particular feels in line with trending Arlo.

Django — the D is silent as most everyone now knows — the nickname of the great Belgian-born jazz guitarist Django (originally Jean Baptiste) Reinhardt, makes a dynamic musical choice for any jazz aficionado. Reinhardt's nickname "Django" is Romani for "I awake." The name has become more familiar with the release of and acclaim for the Quentin Tarantino film Django Unchained.

Quirky Italian baby name that works for any gender.

Nicolo is a more lively variation of Nicholas and one of the most attractive Italian names for boys. A name with a long, distinguished Italian history of its own, it also boasts the charming nickname Nico.

Short form of Adebayo

This Dutch form of the ancient Greek saints' name Tycho is in the Top 100 in The Netherlands. While largely unknown in the English-speaking world, it's got a cool sound and ancient roots, which equals a winning choice.

Aro is a cute name from Scandinavia which, given the popularity of similar names like Milo, Arlo etc might be ripe for more usage outside of the Nordic countries.

One of the best known early Nemos was the captain in Twenty Thousand Leagues under the Sea, while the more familiar modern one is the animated little orange fish in the Disney movie. Unusual name well worth considering. By the way, there is also a Shakespearean Nemo and one in Dickens's Bleak House. An enchanting early comic strip by Winsor McCay was called Little Nemo.