Family name Демура-Прокопчук (Демура-Прокопчук 
) , all around the world, is an extremely rare cognomen. The last name Демура-Прокопчук is habitual in Eastern Europe, particularly Ukraine, where it is an extremely rare surname. Parts of the name also exists independently as a last name Демура, and a last name Прокопчук.
| VARIANT | COUNTRY |
|---|---|
| Демура-Прокопчук | Ukraine |