1770+ Boy Names Ending in O

Silvanus was the Roman god of the forests and is also an alternate name in the New Testament for Silas. Relatives include Silvio, Silvius, and Sylvia.

Kazuo is a boys' name well-used in Japan though not well-known in the U.S. Kazuo Ishiguro is the author of Remains of the Day and Never Let Me Go. The emphasis is on the first syllable.

In Shakespeare's Romeo & Juliet, the friend who persuades Romeo to go to the party where he meets Juliet. Alas.

Bardo has a poetic beginning and upbeat ending, with roots in several diverse cultures. It may be most familiar today via George Saunders' novel Lincoln in the Bardo, which refers to the Tibetan Buddhist state of suspension between one life and the next, resembling the Christian idea of Limbo. Bardo is also an ancient saint's name: Saint Bardo was the eleventh century bishop of Mainz, in Germany. Actress Sandra Bullock chose Bardo as her son's middle.

Marko is one of the many names derived from Mars, the god of war. Marco is the more usual Spanish form but Marko is a variation used in Spain along with Russia, Ukraine, and several Slavic countries.

Ugo is very common in Italy, but here it might call to mind that little Yugoslavian car.

Shortening Francisco somehow makes it sound even cooler. Cisco is also the name of a digital security company.

A saint and surname often heard in Italy.

Cool Finnish name ripe for import.

Elegant and worldly.

An attractive surname, but also the name of a popular cookie.

Fiorello is one of the few floral names that works well for a boy. The colorful three-term World War II New York Mayor La Guardia made this one famous -- in fact he was nicknamed "the Little Flower". His life was the basis for the 1959 musical called, appropriately, "Fiorello!"

With cool, on-trend sounds and a hint of Star Wars about it, Rylo is an up-and-coming name that has only seen notable use since 2016. It can be considered a Scottish diminutive of Ryland and an Irish surname, but also a compound name made up of Ryan and Milo. Given to nearly 130 babies in 2023, it has been rising in use every year since the mid 2010s.

A cutesy nickname — identical sounding to the more substantial Rue and Roux.

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.

Singer Perry is long gone, but the beautiful northern Italian lake conjures up a clear and tranquil image.

Italian variation of Aurelius.

Heard most frequently in 18th century Japan, Hanzo is a rarity in modern culture. Hattori Hanzo was a legendary samurai of the Sengoku Era. A modern day namesake might be Hanzo Shimada, from the video game Overwatch. Hanzo is one of many unique baby names from Asia and from the gaming world.

Superhero names are fit for humans today, and there's no reason Rambo can't take his place among a generation of babies named Loki, Odin, and Atlas.

Whether Neco is a spelling variation of the ever-more-popular Nico, pronounced NEE-koh, or an invented name all its own, it is a highly uncommon choice, given to just 5 baby boys in the US in 2021.