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