1770+ Boy Names Ending in O

Elaborated form of Antonio, from the Roman cognomen Antoninus, borne by a 2nd century Roman Emperor.

Is it a real name....or no?

Indalecio is an old Spanish name that is newly popular in Argentina.

A literary nod to the great 19th century Basque writer Agosti Xaho, or Augustin Chaho in French, who wrote important Basque works such as The Legend of Aitor.