1770+ Boy Names Ending in O

A Portuguese classic, typically spelled with a tilde over the A. Many members of the Portuguese royal family were named João, and today it’s associated with a number of Portuguese and Brazilian footballers.

Diago is sure to be confused with the more common Diego, the Spanish form of James.

In Greek mythology, Sao was one of the 50 Nereids, daughters of the sea god Nereus. A moon of Neptune is named in her honor. In modern times, it works equally well for a son.

This Italian form of Benedict sidesteps the Benedict Arnold association that still clouds the English version.

Arvo is a simple name virtually unknown in the US and UK that might get discovered thanks to the surprise popularity of Arlo.

This is a Spanish variation of Maximilian that has begun to gain some popularity. It has a luxurious feel -- maybe it's the suggestion of "millions"? -- but this is one of those Spanish baby names that come with Anglicized nicknames that can make it work across cultures.

Widely used in the Latino community, the name gained renown in the nineties for its association with rapper Gerardo Mejía of 'Rico Suave' fame.

Old-school Italian names that shortens a wide range of longer names, making it feel much more popular than it is on its own.

The Ashantis of Ghana traditionally use this animated name for boys born on Monday. The girls' equivalent is Adwoa, pronounced ahj-wa.

A redhead supporting hero in Naruto, whose name refers to the greater good he contributes to even after his death.

This ancient saint's name was borne by the infamous midcentury playboy, Porfirio Rubirosa.

Artemio gives energy to this august Greek mythological name.

Quirky form of Ishmael found in Nordic countries.

An unusual name heard in contemporary Germany, the Netherlands, and Scandinavia, it's the male version of the more familiar Inga. It's the name of a German god, and attached to German-born soap star Ingo Rademacher--the father of sons named Peanut and Pohaku Zen.

A literary name coined by the French playwright Pierre-Augustin Caron de Beaumarchais for the central character in his plays The Barber of Seville, The Marriage of Figaro and The Guilty Mother. It is thought that he based the name on his own nickname. In modern French, the word has come to mean "barber", due to the famous character's profession.

Rare Spanish form of Valerius

Appealing, upbeat name used mainly in Spanish-speaking countries.

Giulio is a Top 50 name in Italy, and we think Giulio is a good candidate to follow, especially now that Giovanni and Gianni are in up in the US charts. It's an interesting alternative to popular cousins Julian and Julius. And of course the most famous Giulio of all is the Emperor, Giulio Cesare.