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 | Spain, Philippines, United States, Argentina, France |
| Bajon | Spain, Philippines, United States, Poland, France |
| Baion | Italy, Philippines, United States, India, Brazil |
| Байон | Kazakhstan, Russia, Ukraine |