Family name Маниак (Manyak 
, Maniak 
, Manijak 
) , in all the world, is quite a common cognomen. The last name Маниак is characteristic of Poland, where it is quite a rare surname, Slovakia, and Georgia. Measured by absolute frequency, it is commonest in Indonesia, Poland, and the United States. More prevalently, Маниак is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Manyak | Germany, Indonesia, United States, India, Slovakia |
| Maniak | Indonesia, Poland, United States, India, Slovakia |
| Manijak | Poland, Serbia, Denmark, United States |
| Маниак | Russia |