Family name Nieczaj (Nieczaj 
) , all over the world, is a rare last name. The surname Nieczaj is characteristic of Poland, where it is a rare surname, Argentina, where it is a very rare surname, and Germany, where it is an extremely rare surname. Also, Nieczaj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nieczaj | Germany, Argentina, Brazil, Poland, United States |
| mikołaj nieczaj PL (b. 1818) |
|
|
| rolf nieczaj (b. 1956) |
|
|
| iwan nieczaj |
|