Surname Блатт (Blatt 
, Блатт 
) , all around the world, is quite a common last name. The last name Блатт is habitual in Western Europe, particularly Germany, where it is quite a rare surname, Austria, and Switzerland. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Blatt | Germany, United States, Canada, France, Brazil |
| Блатт | Russia, Ukraine |