Surname Ruktangtum (Ruktangtum 
) , throughout the world, is a very rare family name. The cognomen Ruktangtum is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruktangtum | Thailand |
Karun, Navarat, Nawarat, and Whichakorn