Cognomen แพงจันทร์ (แพงจันทร์ 
, Paengchan 
) , globally, is a rare family name. The last name แพงจันทร์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, แพงจันทร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| แพงจันทร์ | Thailand |
| Paengchan | Thailand, Philippines |