Cool Names with a Strong O

Energetic Italian classic that would blend with a surname of any ethnicity.

Widely heard in both Italian and Spanish households, Sergio and his many international brothers are rooted in Sergius, one of the original Roman family names. The meaning is unknown, but possibly is related to servant or protector.

Oak, a symbol of solidity, strength, and longevity, is joining Cedar and Pine as a viable name, one that would work especially well in the middle.

Calixto is known in Spain as the name of three popes, one of whom was the martyr, Callixtus I, regarded as a saint. Calixto has a lot of energy and futuristic spirit, thanks in part to the attention-grabbing 'x.' He is the main character in the Spanish classic, Fernando de Rojas's Tragicomedy of Calixto and Melibea.

More creative and artsy than Mario. Dario is starting to edge up the US popularity list after languishing near the bottom of the Top 1000 over the last four decades. Is that inspired by Dario's popularity in Italy, Spain, Germany, and Switzerland?

Oakley, with its nature name roots and its Annie Oakley charm, is a hot name for both genders but more than twice as popular for girls. This name made it into the Top 1000 for the first time in 2013, one of only four girl names starting with O to rank that high. A decade letter, it's aiming for the Top 100.

Alonzo is dashing and debonair, with a large measure of Latin flair.

Massimo is a Latin charmer, much more appealing than the old-fashioned Mario, and is a charismatic member of the Maximus/Magnus family.

Pablo, the commonly used Spanish version of Paul, has the added bonus of some fantastic artistic bearers: painter Picasso, cellist Casals, and poet Neruda. Pablo has been consistently in the US charts since records began, and has been within the Top 500 since the mid 60s. However, Pablo has never cracked the Top 200, making it familiar but not overused or tired.

This may be a legitimate Hebrew name denoting power, but to any American kid, it will evoke ruby slippers and a yellow brick road. The full Hebrew name is Ozni, who was a grandson of Jacob in the Bible.

This Slavic form of the Norse name Helga is a classic in many Slavic countries, including Russia and Poland, where it currently ranks within the Top 100 girl names. It has historically ranked among the most popular names in countries including Ukraine, Latvia, Spain, France, Serbia, Greece, the US, and many more. Olga is a common name even in Scandinavian countries, such as Sweden and Norway, despite Helga being a more traditional choice. Olha is the uniquely Ukrainian variation.

More and more frequently heard as the Gallic version of Oliver, Olivier could be seen as a tribute to the great British actor, Sir Laurence O.

For anyone seeking a more unusual version of Alexander, this is a real winner.

Like Horace, Horatio is a variation on the Latin Horatius, but its Shakespearean and optimistic Horatio Alger pedigree makes it an attractive up-and-comer, especially with its cool final o. A modern reference is the charismatic TV character Horatio Caine played by David Caruso in CSI: Miami.

Cairo is an exciting place name possibility with upbeat o ending and an on-trend first syllable. Debuting in the US Top 1000 in 2015, it has been climbing ever since, and, as of 2023, it is given to more than 1000 babies each year.

Roman statesman's name with a cool and quirky sound. Marcus Tullius Cicero was a Roman scholar, orator and lawyer who had an immense impact on the Latin language.

Rollo is a livelier, roly-poly, o-ending version of Roland.

A vibrant, operatic Latin choice.

Pretty Hebrew name that would create a strong but feminine impression, as well as a variant of the Germanic name Odilia or Ottilie.

Ozzy has been on the rise in recent years and currently sits in the Top 1000 in the UK and the US. The Ozzie spelling has yet to catch up, but has nevertheless gained more attention thanks to its popular counterpart. Given to 135 boys and to 50 girls in 2023, for every one Ozzie there are three Ozzys.