Cognomen หัวเพชร (หัวเพชร 
, Kawpet , Huapet ) , globally, is a very rare last name. The cognomen หัวเพชร is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| หัวเพชร, Huaphet, Kawpet, Huapet | Thailand |