Surname Phithack (Phithack 
) , in all the world, is an extremely rare cognomen. Much more frequently, Phithack is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phithack | United States, Thailand |
Sisombat, Vongxay, Sribouavong, Nilnopkoon, and Thongsavath