1770+ Boy Names Ending in O

The attractive Portuguese form of Gaëtan/Gaetano, meaning "from Gaeta" (a town in ancient Italy).

Ensio derives from the Finnish word ensimmäinen, meaning "first one."

Aryobarzanes or Aryo Barzan, meaning "exalting the Aryans", is the name of a Persian hero who fought against Alexander the Great in 330 BC.

God of rebirth worshipped in Central and Eastern Europe. Yarilo represented the sacred youthful life-force and was associated with spring and agricultural fertility.

Another appealing member of the Alexandrian clan.

After your first little Primo, you could always call the next Segundo -- though that's like naming them number one and number two.

A vireo is a small green bird with a song as melodic as this highly unusual name, but it does sound a touch viral.

Although the female version Bianca has long been accepted as a name outside Italy, maybe it's time to consider this boy color name.

An adolescent boy might have problems with the first syllable.

Bamboo is a plant name that you might want to save for the zoo's name-the-panda contest. It was used for a starbaby in 2000, though, the rapper Big Boi.

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