Family name Kulapha (Kulapha 
) , in the entire world, is an extremely rare cognomen. The surname Kulapha is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Kulapha is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kulapha | Thailand |
Racharugsa, and Kittikhunseree