Family name Гапоньчук (Гапоньчук 
) , all around the world, is an extremely rare cognomen. The cognomen Гапоньчук is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Гапоньчук | Russia |
Gaponchuk, Gapontchouk, and Haponchuk