Last name Keirttisak (Keirttisak 
) , around the world, is an extremely rare family name. The cognomen Keirttisak is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, Keirttisak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Keirttisak | Thailand |