Cognomen Коломеичук (Коломеичук 
, Kolomeychuk 
) , in the entire world, is a very rare last name. The surname Коломеичук is characteristic of Russia, where it is a very rare surname, Canada, and Ukraine, where it is an extremely rare surname. In absolute terms, this name is the most popular in Russia, the United States, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Коломеичук | Russia |
| Kolomeychuk | Russia, United States, Ukraine, Canada |