Surname แก้วประพันธ์ (แก้วประพันธ์, Khaewpraparn 
, Gaewprapun 
) , in the entire world, is a very rare last name. The last name แก้วประพันธ์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khaewpraparn | Thailand |
| Gaewprapun, Kaewprapan | United States, Thailand |
Kaeoprapan, Kaeopraphan, Kaewprapant, Kaewpraparn, Kaewpraphan, Kaewpraphun, Kaewprapun, Keawprapan, and Keawpraphan