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, United States, South Africa, India, Honduras |
| Риган | Kazakhstan, Russia, Kyrgyzstan, Ukraine |