Cognomen Герен (Haran 
, Geren 
, Guérin 
) , globally, is a common last name. The surname Герен is characteristic of Aland Islands, where it is quite a common surname, Sri Lanka, where it is quite a rare surname, and Ireland. Measured by absolute frequency, it is the most numerous in India, France, and the United States. Likewise, Герен is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Haran | United States, Turkey, France, Sri Lanka, India |
| Geren | United Kingdom, United States, Turkey, France, India |
| Guérin | Canada, United Kingdom, United States, France, Australia |
| Герен | Belarus, Ukraine, Russia |