Last name Máčaj (Máčaj 
) , in the world, is a very rare cognomen. The cognomen Máčaj is characteristic of Eastern Europe, particularly Slovakia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Máčaj | Slovakia |
| alexander máčaj SK (b. 1664) |
|
|
| ján máčaj Slovak soccer player (b. 1957) |
|