Surname วุฒิรัญญูกูล (วุฒิรัญญูกูล 
) , in the world, is an extremely rare cognomen. The last name วุฒิรัญญูกูล is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| วุฒิรัญญูกูล | Thailand |