Family name วัสสา (Vatsa 
, Watsa 
, วัสสา ) , in the world, is quite a common last name. The last name วัสสา is habitual in Cameroon, where it is quite a rare surname, Estonia, where it is a rare surname, and India. In absolute terms, the name is most common in India, Cameroon, and the United States. Very seldom, วัสสา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vatsa | Canada, India, Thailand, United States, Nigeria |
| Watsa | Canada, India, Cameroon, Thailand, United States |
| วัสสา | Thailand |