Family name Байон (Bayon 
, Bajon 
, Baion 
) , globally, is a common cognomen. The cognomen Байон is habitual in Reunion, where it is quite a common surname, Argentina, where it is quite a rare surname, and France. Not in comparison with a country's population, it is commonest in Philippines, France, and Argentina. Very seldom, Байон is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bayon | France, Spain, Philippines, Argentina, United States |
| Bajon | France, Spain, Philippines, United States, Poland |
| Baion | Philippines, Brazil, United States, Italy, India |
| Байон | Kazakhstan, Russia, Ukraine |