Family name Thanousak (Thanousak 
) , in the world, is an extremely rare cognomen. Much more prevalently, Thanousak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanousak | Laos, United States, Canada |
Themany, Phanvixai, Chanminaraj, Thammachak, and Vongsamphan