1770+ Boy Names Ending in O

Lengthy, romantic Alessandro gives us the friendly and casual nickname Sandro, which works just as well as an independent name. It’s a popular international name, having ranked in Italy, France, Portugal, and Switzerland in recent years.

An energetic African name with a stylish o ending.

Kato gained a lot of attention during the O. J. Simpson trial via witness Kato Kaelin (born Brian). It is also the name of a fictional character in "The Green Hornet." Spelled Cato, it has a lot more credibility as an ancient name.

What with Paul Simon's classic lyric about Julio down by the schoolyard and several distinguished bearers, this livelier Spanish version of Julius is completely familiar to the non-Hispanic community and would make a great choice for a bicultural family. Popular in Brazil, it also ranks in the US Top 600 and given to more than 500 boys each year. NFL Atlanta Falcons star Julio Jones bears this name.

Another Spanish boys' name that relates to a goddess, the Egyptian Isis. San Isidro is the patron saint of Madrid.

Rolo is a playful masculine name with multiple possible origins. It may be a diminutive of names like Roland or Ronald, or derive from the Old Norse name Hrólfr (which evolved into Rollo), meaning 'famous wolf.' Historically, Rollo was the Viking leader who founded Normandy in France. The name has a cheerful, approachable quality with its rhythmic sound and 'o' ending. Some may associate it with the caramel candy of the same name, giving it a sweet, nostalgic quality. Though uncommon as a formal name, Rolo works well as a nickname and has seen occasional use in Spanish-speaking countries. Its brevity and friendly sound make it distinctive yet accessible.

More familiar to English speakers in the Italian Elio form.

With its musical allusions, a harmonious possibility.

Joyful-sounding name that makes a really original option.

A Top 10 name in Switzerland, Leano has a number of possible origins. On one hand, it may derive as a contracted form of Leandro or Leonardo, meaning "lion man" and "brave lion" respectively. Alternatively, it may come from Ileano, likely a form of Ileana, itself a variation on Helen meaning "shining torch."

A welcoming name that seems to say "hello". Celio can be thought of as a much rarer male variation of Celia. With heavenly names in the ascendant, we may be hearing lots more of Celio.

Kitto updates Dad Name Christopher with a trendy o-ending short form. Use it as an honor name or an original nickname.

Consider this short form for your little Richard.

A classic Italian name still heard in the Italian-American community. Once tainted by the association with the Spanish dictator, it's now more likely to call up actor James Franco.

This Italian version of the ancient Roman Livius, with an unenviable meaning, is popular in France and make a fresh spin on Oliver or Levi. In the US, this is a very rare name -- it was given to no baby boys in 2022 -- with big potential.

Neko is a masculine name with multicultural origins and meanings. In Japanese, "neko" means "cat," symbolizing independence, mystery, and grace in Japanese culture. The name also exists in African traditions, particularly in Nigeria, where it can mean "gift from God" or "time" in certain dialects. This cultural versatility makes Neko appealing to diverse families. While uncommon in Western countries, the name has gained some recognition through Japanese animation and pop culture. Neko's brevity and distinctive sound make it memorable, while its soft consonants create a gentle yet strong impression. For parents seeking a concise, meaningful name that works well internationally and carries positive associations across cultures, Neko offers a compelling choice.

Rino is a masculine name with multiple cultural origins. In Japanese, it can mean 'value, benefit' or 'jasmine, village,' depending on the kanji characters used. In Italian, Rino functions as a diminutive of names like Marino or Severino, while also sometimes serving as a nickname for Caterino. The name is also used in Finland as a standalone given name. Rino has the appeal of being short, distinctive, and easy to pronounce across multiple languages, giving it international versatility. While uncommon in English-speaking countries, it has maintained steady usage in Japan, Italy, and parts of Scandinavia. The name's brevity aligns with contemporary preferences for shorter, distinctive boys' names.

Commonly used Japanese name -- and not only for a second son.

Has diverse associations: the long-term Communist head of Yugoslavia, one of Michael Jackson's older brothers, and an animated Disney character -- none of them a very strong recommendation.

Simple and sweet name for a son that feels on-trend in this era of Kai.