Last name Крул (Krul 
, Krull , Крул 
) , throughout the world, is a common surname. The last name Крул is habitual in Netherlands, where it is quite a rare surname, Estonia, and Germany. In absolute terms, it is the most numerous in Germany, the United States, and Brazil. Very seldom, Крул is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Krul, Krull | Germany, United States, Poland, Brazil, Netherlands |
| Крул | Russia, Ukraine |
| Kroul | Germany, Czechia, Denmark, United States, France |