Best Boy Names Ending in O

Calisto is a masculine name derived from Greek mythology, where Callisto was a nymph who was transformed into the constellation Ursa Major. The masculine form shifts the mythological association while maintaining the celestial connection. The name comes from Greek 'kallistos' meaning 'most beautiful.' While the feminine form Callista is more common in English-speaking countries, Calisto offers a distinctive alternative for boys. The name carries an artistic, sophisticated quality with its classical roots and melodic sound. Popular in some Latin cultures, Calisto provides a unique option that balances exotic appeal with historical depth. Its connection to the stars gives it an aspirational, expansive quality that many parents find appealing.

The most popular of the number names used by Hispanic parents, open to all. Octavia and Octavio are two Spanish baby names that are moving out into the wider world.

More neo than Neo, this is a name heard in the Power Rangers film title Power Rangers Zeo.

Horacio is the Spanish and Portuguese form of Horatius, a masculine name of Latin origin derived from the Roman clan name Horatius, whose meaning remains uncertain. Made famous by the Roman poet Horace (Quintus Horatius Flaccus), the name carries literary and intellectual associations. Horacio has been consistently popular in Spanish-speaking countries and Brazil, appreciated for its classical roots and distinguished sound. The name conveys a sense of cultural sophistication and historical depth. Notable bearers include Argentine writer Horacio Quiroga and numerous politicians and artists throughout Latin America, helping maintain the name's prestigious reputation.

Long considered Mr. Hall's exclusive property, it's now ready to be adopted by others.

This cute Estonian name is typically a short form of Endel, although it has a history of being used as a stand-alone. It originates in the feminine name Endla, originally the name of an Estonian lake. Easy to spell and pronounce, with a fun sound and the cool -o ending, Endo is a name that could cross cultures easily.

Cesario is a masculine name with Italian and Spanish origins, derived from the Latin name 'Caesar,' which means 'long-haired' or 'head of hair.' Historically, the name carries prestigious connotations due to its association with the Roman Julius Caesar and the subsequent imperial title. Cesario has remained relatively uncommon in English-speaking countries, maintaining its distinctive character as a heritage name in Italian and Hispanic communities. The name appears in literature, most notably in Shakespeare's 'Twelfth Night,' where Viola disguises herself as a character named Cesario. With its melodic quality and rich historical connections, Cesario offers a distinctive option for parents seeking a name with classical roots and a romantic Mediterranean flair.

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.

We've seen babies with Texas city names like Austin, Houston and Dallas--, why not the unexplored Laredo, which has a lot of cowboy charisma? Laredo might make for a more modern and creative namesake for an Uncle Lawrence/Larry--as could the related Laramie.

This sparky form of Vincent is used in Croatia and Slovenia, and it switches the stately feel of the original for something more playful with its fun -o ending sound.

Vieno is a unisex name that comes from the Finnish word for "gentle". With its dashing -o ending and sleek sound, we think that Vieno is a fashionable choice that could work well outside of Finland.

Timeo is a Top 100 name in France but is virtually unknown in the English-speaking world. Appearing briefly in the New Testament and related to Timon, a Shakespearean name, Timeo is a valid possibility for parents looking for an unusual name with cross-cultural cred.

Appearing on a character in Shakespeare's semi-historical play,Macbeth and in an earlier work called Holinshed's Chronicles from which Shakespeare took inspiration, the name Banquo has yet to appear in the US Stats. Possibly derived from the elements bàncù meaning "hound", the exact meaning is of the name is unknown.

A stalwart of Latin nomenclature that could work just as well for Anglos. Proof lies with the celebrity birth announcement — Hilaria and Alec Baldwin named their fifth child Eduardo Pau Lucas in 2020. This doesn't seem to have much impact on other parents, though: over 900 boys received the name in 2021, but the number is steadily decreasing.

This name of a renowned Apache leader and mystic would be a difficult choice, since it was used as a rallying cry in so many old westerns and by paratroopers jumping out of their planes in World War II.

Romero is one of the less common variations of the stylish family of Rome-related names. Only 32 baby boys were named Romero in the US last year, versus nearly 5000 named Roman and 1100 named Romeo.

A short and snappy South Slavic name with a powerful, uplifting meaning.

Widely used in Italy, Spain, and Portugal, has an air of generosity and could easily be adopted here.

Artemio gives energy to this august Greek mythological name.