Last name Balduinus (Baudouin 
, Balduino 
, Baldovino 
) , worldwide, is a common family name. The last name Balduinus is characteristic of France, where it is quite a common surname, Colombia, where it is quite a rare surname, and Argentina. In absolute terms, this name is the most popular in France, Brazil, and Philippines. Likewise, Balduinus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Baudouin | Brazil, France, Argentina, Democratic Republic of the Congo, Cameroon |
| Balduino | Colombia, Brazil, Mexico, France, Argentina |
| Baldovino | Philippines, Colombia, Brazil, France, Argentina |