Family name Heyck-Cohnitz (Heyck-Cohnitz 
) , worldwide, is an extremely rare last name. The cognomen Heyck-Cohnitz is habitual in Western Europe, particularly Germany, where it is an extremely rare surname. Parts of the name also exists independently as a last name Heyck, and a last name Cohnitz.
| VARIANT | COUNTRY |
|---|---|
| Heyck-Cohnitz | Germany |