Last name فيال (Vial 
, فيال 
) , in all the world, is a common surname. The cognomen فيال is characteristic of France, where it is quite a common surname, Chile, where it is quite a rare surname, and Switzerland. Measured by absolute frequency, it is commonest in France, Brazil, and Chile. Very seldom, فيال is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vial | France, Brazil, Chile, United States, Democratic Republic of the Congo |
| فيال | Iraq, Libya, Sudan, Iran |