Names Ending in O for Boys

Armenian surname that could easily work in the US. 

Haro

Hot name best used as a middle, as Paula Patton and Robin Thicke did for their son Julian in 2010.

Fuego

Kwadjo

Ravello is an Italian town on the Amalfi Coast. It's a popular travel destination and was a favorite spot for many notable creatives, including Virginia Woolf, Greta Garbo, and Tennessee Williams. 
 
With its cool -o ending, sharp V sound, and slight similarity to Rafael, Ravello could work as a bold but not outrageous choice. In fact, two celebrities have already picked it: Woody Harrelson used it as the middle name of his daughter Makani in 2006, and British reality TV star Lucy Mecklenburgh gave it as a middle to her son Roman in 2020. 
 
The exact meaning of the name is unknown, but theories include that it emerged from the Latin rebello meaning "revolt" or "wage war" or from the Italian rivellino (likely derived from Latin), referring to a type of fortification also known as a ravelin.

Ravello

Both Tullio and Tulio are modern forms of the ancient Roman family name Tullius.  Though its meaning is unknown, Tullius has an illustrious history with many noble bearers, including a sixth century king and the philosopher Marcus Tullius Cicero.  Tullio can be shortened to Tully, more properly an Irish surname with a tangled history of its own, while Tulio can be a substitute for Julio.

Tullio

Quirky tree name with baby name potential.

Ginkgo

Heard in both Italy and Spain, Tulio could make a more unusual alternative to Julio. Or with the rediscovery of many Roman names, you might want to go to the original Tullius, the middle name of the philosopher and statesman Cicero. 
 
Though the Irish Tully has a different root, it can make a sprightly nickname.

Tulio

Tico is a diminutive of Alberto, but on the soap opera One Life to Live, Tico Santi's full name was Augustico.

Tico

Ignatio is a masculine name representing a variation of Ignatius, which derives from the Latin name Ignatius, originally from the Roman family name Egnatius of Etruscan origins. The name gained prominence through Saint Ignatius of Loyola, founder of the Jesuit order. This particular spelling variation, Ignatio, shows Spanish or Italian influence, where it's sometimes used as an alternative to Ignacio (Spanish) or Ignazio (Italian). The name carries connotations of fiery passion and ardor, as it relates to the Latin word 'ignis' meaning 'fire.' Though less common than its variants, Ignatio maintains the dignified, classical quality of the original while offering a slightly distinctive spelling for those seeking a traditional name with individual character.

Ignatio

Ivano is a name that's a variation of a variation, with Ivan a common Russian and Eastern European version of John. Ivano puts an Italian spin on the name.

Ivano

Trentonio is a masculine name that combines the popular name 'Trent' with an Italian-style suffix. Trent itself derives from an Old English surname referring to the Trent River, meaning 'strongly flowing.' The addition of '-onio' creates a more elaborate, romantic variation that echoes Italian naming patterns like Antonio or Gregorio. While not commonly used in mainstream culture, Trentonio offers parents seeking distinctive names an option with European flair. It maintains the strong, masculine quality of Trent while adding a melodic, sophisticated extension that makes it stand out among more conventional choices. The name may appeal to families with Italian heritage or those looking for a unique twist on the shorter form.

Trentonio

With the "oo" sound all the rage these days, Luvo makes a good choice if you are looking for a name that is unusual but sounds on-trend.

Luvo

Raido is the rune that corresponds with the Latin letter R in the Elder Furthark runic alphabet. In Old English, it was translated at Rad. Nowadays it makes an interesting baby name for linguists and language-enthusiasts.

Raido

Could be an interesting alternative to London, now that that one is firmly on the girl's side. Londo Mollari is a character from the TV show Babylon 5.

Londo

Obscure Japanese pick, recognizable to fans of the 1989 Japanese science fiction horror film Tetsuo: The Iron Man.

Tetsuo

Italian surname most Americans will associate with actress Edie Falco, of Sopranos fame.

Falco

Goro

Trentino is a masculine name with Italian origins, possibly derived from the Trentino region in northern Italy. The name carries geographic significance and cultural heritage, making it appealing for families with Italian connections. As a personal name, Trentino is relatively uncommon, giving it a distinctive quality. It can be seen as an elaborate variation of the more common name Trent, which means 'rapid water' or 'torrent.' The '-ino' suffix adds a diminutive, affectionate quality in Italian naming traditions. While rare in international usage, Trentino has a melodic sound characteristic of Italian names. Its regional associations make it particularly meaningful for those with connections to northern Italian heritage.

Trentino

Ygnasio is a masculine name that appears to be a variant spelling of Ignacio, which itself derives from the Latin name Ignatius. The original Latin name comes from 'ignis' meaning 'fire.' This spelling variation with the initial 'Y' instead of 'I' likely reflects phonetic adaptations that occurred in certain Spanish-speaking regions or possibly Filipino naming traditions, where Spanish names were often adapted with unique spellings. The name carries the historical significance of St. Ignatius of Loyola, founder of the Jesuit order. While the standard spelling Ignacio is fairly common in Spanish-speaking countries, Ygnasio represents a much rarer variant. The name conveys strength and historical depth while the uncommon spelling adds a distinctive character that sets it apart from more conventional forms.

Ygnasio

Trento is a masculine name derived from the Italian city of Trento, located in northern Italy in the Trentino-Alto Adige region. As a place name turned personal name, it carries geographic significance and cultural heritage, a practice common in Italian naming traditions. The name has a distinctly Italian sound with its characteristic ending 'o' while remaining concise and strong. Trento projects confidence and cultural connection, appealing to parents seeking Italian-inspired names beyond the more common options. While relatively rare as a first name internationally, Trento offers a distinctive choice that's both substantive and streamlined. The connection to the historic Italian city, known for its Renaissance architecture and the famous Council of Trent, gives the name added depth and cultural resonance.

Trento

Boy names ending in O offer many intriguing options, from such top names as Theo to unique O-ending names from Kylo to Zino.

Mateo is the most popular boy name ending with O

 right now, though there are nearly 100 O-ending boy names among the US Top 1000. Along with Mateo, other boy names in the US Top 1000 include Leo, Santiago, Diego, Romeo, and Antonio.

unique names for boys that end with the letter O

 worthy of your consideration. These range from the biblical Jethro to the ancient Greek Cosmo to the cool, modern Rio and Po.



Here are all Nameberry’s boy names that end with the letter O, ordered by their current popularity on Nameberry.

Baby boy Names ending in the letter O, with meanings, origins, and popularity, including top boy names that end in O such as Milo and Kylo along with unique O-ending names such as Quinto. (Page 87)

1770+ Boy Names Ending in O