Last name Thonstad (Thonstad 
) , all over the world, is a very rare family name. The cognomen Thonstad is habitual in Norway, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thonstad | United States, Norway |
| tore thonstad (b. 1930) |
|
|
| travis e thonstad Ph.D., University of Washington, civil engineering, 2016 |
|