Cognomen Бегин (Begin 
, Beguin 
, Begyn 
) , all around the world, is a common last name. The cognomen Бегин is characteristic of Switzerland, where it is quite a common surname, Canada, and Belgium, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in France, Canada, and the United States. Much less frequently, Бегин is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Begin | Belgium, Indonesia, Canada, France, United States |
| Beguin | Belgium, Canada, France, United States, Switzerland |
| Begyn | Belgium, Canada, France, Germany, United States |
| Бегин | Belarus, Ukraine, Russia, Kyrgyzstan, Kazakhstan |