Surname Rittisornthanu (Rittisornthanu 
) , in the entire world, is a very rare family name. The surname Rittisornthanu is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rittisornthanu | Thailand |
Sakorn, Pratarn, and Charnnarong