Cognomen Rungsikavanich (Rungsikavanich 
) , in all the world, is an extremely rare last name. The last name Rungsikavanich is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, Rungsikavanich is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rungsikavanich | Thailand |