Cognomen Klongsara (Klongsara 
) , in the entire world, is a very rare last name. The family name Klongsara is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Klongsara | Thailand |
Pichej, Nattawan, Chunyapak, and Duangsamorn