Family name Kallkosol (Kallkosol 
) , in the entire world, is an extremely rare last name. The family name Kallkosol is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kallkosol | Thailand |
Sasi, Sasinipa, Sasiprawan, and Phantavee