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1770+ Boy Names Ending in O

  1. Leno

    • Origin:

      Diminutive of Leonard

    • Meaning:

      "lion"

    • Description:

      Better than Lenny, not as good as Leo, and tightly tied to Tonight Show host Jay Leno.
  2. Oreo

    • Origin:

      Brand name

    • Description:

      Oreo is a masculine name derived from the famous sandwich cookie brand introduced in 1912. As a given name, it represents a modern trend of naming inspired by consumer products and pop culture.

  3. Nicasio

    • Origin:

      Spanish from Greek

    • Meaning:

      "victory"

    • Description:

      Closer to Nike than to Nicholas, this is an attractive, viable import. It's also one of several Italian and Spanish baby names that get you to the stylish and attractive nickname Nico.
  4. Armando

    • Origin:

      Spanish, Italian and Portuguese form of Herman, German

    • Meaning:

      "soldier"

    • Description:

      Armando takes the flat-footed Herman and makes it romantic. This is another of the Latin names we expect to be seeing more of.
  5. Bosco

    • Origin:

      Italian saint name

    • Description:

      Also, unfortunately, better known as a chocolate syrup. Borden and Bosco could play well together.
  6. Rico

    • Origin:

      Spanish, diminutive of Ricardo

    • Meaning:

      "dominant ruler"

    • Description:

      Consider this short form for your little Richard.
  7. Kaido

    • Description:

      Kaido is a masculine name with Japanese origins, though it may also appear in other cultures. In Japanese, depending on the kanji characters used, it can have various meanings including 'ocean way,' 'way of the sea,' or 'open road.' The name possesses a strong, distinctive sound that travels well across cultural boundaries. While not common in global naming statistics, Kaido has gained some recognition through Japanese anime and manga characters. Parents might be drawn to this name for its exotic feel, simple pronunciation, and connection to Japanese culture. The name's association with paths and journeys can symbolize life's adventure, making it appealing for parents seeking a name with depth and distinctive character.

  8. Celio

    • Origin:

      Latin

    • Meaning:

      "belonging to heaven"

    • Description:

      A welcoming name that seems to say "hello". Celio can be thought of as a much rarer male variation of Celia. With heavenly names in the ascendant, we may be hearing lots more of Celio.
  9. Philo

    • Origin:

      Greek

    • Meaning:

      "loving"

    • Description:

      Could Philo be the next Milo?
  10. Reno

    • Origin:

      Place-name

    • Description:

      Has a lively and swaggering sound, and also some unfortunate associations with Reno, city of gambling and failed marriages.
  11. Kyoto

    • Origin:

      Place-name

    • Description:

      Japanese city name not yet on the map for babies, but why not?
  12. Caruso

    • Origin:

      Italian surname

    • Description:

      Naples-born Enrico Caruso was one of the greatest opera singers of all time. Recordings of his powerful singing voice are still in circulation today, nearly 100 years after his death.
  13. Maximiliano

    • Origin:

      Spanish

    • Meaning:

      "greatest"

    • Description:

      This is a Spanish variation of Maximilian that has begun to gain some popularity. It has a luxurious feel -- maybe it's the suggestion of "millions"? -- but this is one of those Spanish baby names that come with Anglicized nicknames that can make it work across cultures.
  14. Calixto

    • Origin:

      Greek

    • Meaning:

      "beautiful"

    • Description:

      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.
  15. Romano

    • Description:

      Romano is a masculine name with Italian and Latin origins, meaning 'Roman' or 'from Rome.' It refers to someone connected to Rome or the Roman Empire, carrying the gravitas of one of history's most influential civilizations. The name remains moderately popular in Italy and Italian diaspora communities worldwide. Romano projects strength, classical heritage, and a timeless quality. The name has variants across European languages, including Roman, Romanus, and Romão. With its strong vowel endings and rhythmic sound, Romano embodies Mediterranean charm while honoring ancient Roman traditions, making it appealing to parents who value historical connections and Italian heritage.
  16. Rambo

    • Origin:

      English surname name

    • Description:

      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.
  17. Saro

    • Origin:

      Armenian; Italian; Nigerian

    • Description:

      As a masculine name Saro has three origins:
  18. Ramiro

    • Origin:

      Spanish; Portuguese

    • Meaning:

      "great judge"

    • Description:

      A charming -o name with cool nickname possibilities, Ramiro is also a historical choice: there were 2 Aragonese Spanish kings named Ramiro.
  19. Helio

    • Origin:

      Spanish

    • Meaning:

      "the sun"

    • Description:

      More familiar to English speakers in the Italian Elio form.
  20. Paolo

    • Origin:

      Italian, variation of Paul

    • Meaning:

      "small"

    • Description:

      Paolo is an irresistibly lush Italian name for boys, worlds more romantic than its spare English equivalent.