1770+ Boy Names Ending in O

Tibo is a phonetic spelling of the classic French name Thibault (or Thibaut), which derives from the Germanic name Theobald, meaning "courageous people". It has been recorded in France in recent years.

For lovers of Pasternak's great doctor, a lively middle name choice, one made by actress Nia Long.

Anno is an extreme rarity: a simple, familiar-sounding name with deep history that is completely unknown in the US and rare in its native Germany. Anno is the name of a saint also known as Hanno, a 10th century archbishop of Cologne also known as Hanno of Worms.

While Jairus is rare, this Spanish variation is heard in the US, having ranked in the Top 1000 for the last three decades.

Boo as a first name first achieved notoriety as the name of the child-man in Harper Lee's To Kill A Mockingbird. Arthur "Boo" Radley was meant to be frightening, but only in a simple, non-threatening way. More recently, Boo has been used as the middle name of one of chef Jamie Oliver's children and the nickname in the middle of television's Honey Boo Boo. Boo is also the name of the world's cutest dog and of the adorable little girl in Monsters Inc. In a more basic way, Boo is a term of endearment.

A more distinctive alternative to Alejandro.

Nicknames ending in o are invariably cute, though this one is a boys' name in its own right. And not just any boy name, but a saint's name no less. Saint Hanno, aka Saint Anno, was an 10th century archbishop of Cologne, He is also known as, less attractively, Hanno of Worms, which is one of the oldest cities in Germany.

An offbeat word name referring to the speed of a piece of music.

An admirable meaning, with roots in a Germanic word meaning wisdom, but we fear it will never be detached from the hobbit hero of The Lord of the Rings.

Associated with famed percussionist Mongo Santamaria, but it's too close to the word mongrel to ever have widespread success in this country.

Mellow and musical.

A variant of Estonian Riivo, of uncertain meaning, that fits right in with cool water names like River and Rio.

Sometimes heard in the Latino community, has not crossed over into others.

Flowing, melodic boy name with a sun-drenched meaning.

A heck of a lot cooler than Larry.

An ancient Germanic name belonging to an 8th century duke of Bavaria, as well as to a modern-day prince of Bulgaria. It is a diminutive form from Tasso, which probably derives from the Germanic name Taginbert, a cognate of Dagobert.