Cognomen เบญจวนิช (เบญจวนิช 
, Benjavanich 
) , in all the world, is a very rare last name. The last name เบญจวนิช is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| เบญจวนิช | Thailand |
| Benjavanich | United States |