Family name Ilsch (Ilsch 
) , in the world, is a very rare cognomen. The family name Ilsch is characteristic of Western Europe, particularly Germany, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ilsch | Germany |
| karl-heinz ilsch German association football player (1927-2005), DE (b. 1927) |
|
|
| gerhard ilsch (b. 1925) |
|