Cognomen Rygan (Rygan 
, Риган 
) , throughout the world, is a rare family name. The surname Rygan is characteristic of Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Honduras. Very seldom, Rygan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rygan | Philippines, India, Honduras, South Africa, United States |
| Риган | Kyrgyzstan, Russia, Kazakhstan, Ukraine |