Begins or Ends with O

Gennaro

Italian

"January"

This name of the patron saint of Naples would make an apt choice for a New Year's baby, or one with Neapolitan roots.

Geno

Geno is a masculine name with multiple potential origins. It can be a shortened form of names like Eugene (meaning 'well-born' or 'noble'), Eugenio, or Gennaro (from the Latin Januarius, referring to…

Gilberto

Spanish variation of Gilbert

At this point, there are more newborn American baby Gilbertos than Gilberts.

Gordo

Gordo is a masculine name derived from the Spanish word meaning 'fat' or 'chubby,' often used as a nickname for someone with a stocky build. In Spanish-speaking cultures, it's commonly used as an…

Helio

Spanish

"the sun"

More familiar to English speakers in the Italian Elio form.

Heraldo

Heraldo is a masculine name with Spanish and Italian roots, derived from Germanic origins through the name Harold (meaning "army commander" or "ruler of the army"). The ending "-o" reflects the…

Hespero

Greek

"evening, evening star"

Hespero is a more user-friendly version of Hesperos, in Greek mythology the personalification of the Evening Star.

Hidalgo

Spanish

"nobleman"

Hidalgo is the name of a minor planet, and, on Earth, the Spanish word for a nobleman, but we don't see much crossover potential.

Horatio

English variation of Latin Horatius

"hour, time"

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…

Iago

Welsh and Galician variation of James and Jacob

Iago, the villain of Shakespeare's Othello , was so treacherously evil that his name has hardly ever been heard offstage. Try the much-more-benign Inigo.

Ianto

Welsh

"God is gracious"

Ianto is a lively and unique spin on John, possible familiar to American sci-fi fans via the popular character on Torchwood .

Indigo

Greek

"Indian dye"

Indigo is one of the most appealing and evocative of the new generation of color names. Color names have joined flower and jewel names -- in a big way -- and Indigo, a deep blue-purple dye from…

Indio

Spanish

"Indian"

This name of a California desert town, used by Deborah Falconer and Robert Downey, Jr. for their son, makes a much livelier and more individual – not to mention more masculine – improvisation on the…

Isandro

Spanish, from the Greek

"liberator"

A more distinctive alternative to Alejandro.

Itoro

Ibibio

"praise, glory"

Ivo

Germanic, Slavic

"yew wood, archer; God is gracious"

Succinct, stylish, and catchy, Ivo has the energetic impact of other names ending in -o . It is a multicultural choice with two distinct origins, and, as such, is familiar across a variety of…

Javiero

Javiero is a masculine name that represents a Spanish variation of the name Javier or Xavier. It originates from the Basque name Etxeberria, meaning 'new house,' and was popularized through Saint…

Jordano

Jordano is the Italian and Portuguese variation of Jordan, derived from the Hebrew name 'Yarden,' meaning 'to flow down' or 'descend,' referring to the Jordan River. This masculine name combines the…