Surname Блонштейн (Блонштейн 
) , around the globe, is a very rare cognomen. The cognomen Блонштейн is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Блонштейн | Russia, Ukraine |
Blonshtein, and Blonshteyn