Surname فلاك (Flak 
, Flack , فلاك) , in the entire world, is a common family name. The surname فلاك is habitual in Isle of Man, where it is quite a common surname, Reunion, and Poland, where it is quite a rare surname. In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Poland. Also, فلاك is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Flack, Flak | Germany, Australia, United States, United Kingdom, Poland |