Cognomen Birô (Bureau 
, Birô 
) , worldwide, is a common surname. The cognomen Birô is characteristic of Guadeloupe, where it is quite a common surname, France, and Canada, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in France, Canada, and the United States. Much less frequently, Birô is the forename as well as the last name.