Last name Demenga (Demenga 
) , in all the world, is a rare family name. The cognomen Demenga is characteristic of Switzerland, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Demenga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demenga | United States, Switzerland, Italy |
| gertrud demenga CH (b. 1918) |
|
|
| thomas demenga Swiss cellist and composer, CH (b. 1954) |
|
|
| frank demenga (b. 1958) |
|
|
| monika demenga |
|