Family name Phatthachak (Phatthachak 
) , in the world, is a rare cognomen. The last name Phatthachak is characteristic of South-eastern Asia, particularly Laos, where it is quite a rare surname. Very seldom, Phatthachak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phatthachak | Laos, Thailand |