Cognomen วิยะสาร (วิยะสาร 
) , worldwide, is a very rare surname. The cognomen วิยะสาร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, วิยะสาร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| วิยะสาร | Thailand |