Surname Guernan (Guernan 
) , throughout the world, is a very rare cognomen. The last name Guernan is habitual in Morocco, where it is a very rare surname, France, where it is an extremely rare surname, and Spain. Much less frequently, Guernan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guernan | Morocco, Spain, United States, Canada, France |
Med, Aomar, Ismael, and Abdelmajid