Surname Slabej (Slabej 
) , around the world, is a rare cognomen. The surname Slabej is habitual in Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Slabej | Germany, Czechia, Slovakia |
| jan slabej (b. 1866) |
|
|
| jaroslav slabej (b. 1974) |
|