Cognomen Ladstein (Ladstein 
) , in all the world, is a very rare family name. The last name Ladstein is habitual in Norway, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ladstein | Norway, United States |
| jarle ladstein Norwegian judoka (b. 1980) |
|