Family name กัณทอุโมงค์ (กัณทอุโมงค์ 
) , throughout the world, is an extremely rare last name. The last name กัณทอุโมงค์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กัณทอุโมงค์ | Thailand |