Surname Mychalczuk (Mychalczuk 
) , around the world, is a very rare last name. The last name Mychalczuk is habitual in the United Kingdom, where it is a very rare surname, the United States, and Argentina, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in the United States, the United Kingdom, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Mychalczuk | Brazil, United Kingdom, Argentina, United States, Canada |