Surname กุลธวัชวิชัย (กุลธวัชวิชัย 
, Gultawatvichai 
) , globally, is a very rare family name. The family name กุลธวัชวิชัย is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| กุลธวัชวิชัย | Thailand |
| Gultawatvichai | United States, Thailand |