Surname Masełko (Masełko 
) , all around the world, is a rare cognomen. The family name Masełko is characteristic of Eastern Europe, particularly Poland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Masełko | Poland |
|
jerzy masełko Polish and American chemist, US (b. 1944) |
|
| zdzisław masełko PL (b. 1922) |
|