Family name กระจ่างวุฒิชัย (กระจ่างวุฒิชัย, Krachangwuttichai, Krajangwutthichai 
) , all around the world, is a very rare cognomen. The last name กระจ่างวุฒิชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Krajangwuttichai, Krajangwutthichai | Thailand |