Cognomen Kwec (Kwec 
) , around the world, is a very rare family name. The surname Kwec is characteristic of Poland, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. More prevalently, Kwec is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kwec | United States, Poland, United Kingdom |