Last name Duwaldt (Duwaldt 
) , in the entire world, is a very rare family name. The surname Duwaldt is characteristic of Finland, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Duwaldt is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duwaldt | Finland, South Africa, United States |