Unique Baby Names That End in O

Shiny and sylvan choice.

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.

Sholto is a traditional Scottish first name, especially within the Douglas clan. It's an Anglicized form of Sìoltach, meaning "sower".

This tiny but punchy name has multiple origins. It stands strong alone, but could be short for numerous names including Bonnie and Bodhi. In Mandarin Chinese, Bo means "wave".

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.

Mungo is one of the most classic Scottish names but perhaps also among the most difficult names to carry. There is a St. Mungo whose proper name was Kentigern; he is the patron saint of Glasgow.

Best known as one of the moons of Jupiter, Callisto was a nymph coveted by Zeus who was turned into a bear by Hera, becoming the Great Bear (Ursa Major) constellation.

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

Winslow's most famous reference may be male painter Winslow Homer, but as a name it's beginning to be on the rise for girls. Adorable nickname Winnie may be the reason. Other unusual painterly possibilities for either sex: O'Keeffe, Hopper, and just plain Painter.

This cool and quirky short form of the suave Ludovic could be an even-more-adventurous spin on Nico and Hugo.

Tycho and Tychon are Greek names with modern variations such as the Danish Tyge, the Swedish Tyko, and the Dutch Tygo that are popular throughout modern Europe. Tycho was the name of a Greek saint and a Danish astronomer.

Popular in its own right in Germany and definitely makes a more intriguing and grownup short form of the classic Timothy than Timmy or even Tim.

Orlo is a name nobody ever heard of until the surprise popularity of the unrelated but similar-sounding Arlo. If Arlo can be a hit, why not Orlo? Why not indeed.

Names ending with O are popular, but this one is almost unheard-of. Faro has the advantages of being easy to spell and pronounce (unless it's confused with Pharaoh), and a bright meaning. Ultimately it comes from Pharos, the island where the great Lighthouse of Alexandria was built, and there's a district and city in Portugal called Faro. Be aware: it's also the name of a gambling card game, highly popular in the nineteenth century before poker took over.

The name of the great Renaissance astronomer and mathematician would make a distinctive hero-middle-name for the son of parents involved in those fields.

With Isabel getting so popular, parents are searching for new varieties of the name, and Isabeau is one that makes a lovely French twist.

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.

Benno is a cool name in its own right -- there was a tenth century Saint Benno -- though it is also used as a lively nickname for Benjamin. Saint Benno of Meissen is the patron saint of anglers and weavers and, strangely enough, alliteration.

Despite the possibility of gender confusion, the Hero in Greek myth was a woman. Myleene Klass got that when she chose Hero for her daughter, and Sam Taylor-Wood and Aaron Johnson used it as their daughter's middle--and we wouldn't be surprised to see more girls with this heroic name.