Family name فليش (Flesch 
, Fleiss 
, فليش) , in the entire world, is quite a common last name. The surname فليش is characteristic of Luxembourg, where it is quite a rare surname, Hungary, and Austria. Measured by absolute frequency, it is commonest in Germany, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Flesch | Brazil, France, United States, Germany, Hungary |
| Fleiss | Brazil, France, United States, Germany, Austria |