Surname Gerogan (Gerogan 
) , all around the world, is an extremely rare family name. The surname Gerogan is characteristic of Philippines, where it is an extremely rare surname, Venezuela, and the United Kingdom. In absolute terms, the name is most common in Philippines, the United Kingdom, and the United States. Much less frequently, Gerogan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerogan | Philippines, United Kingdom, United States, Venezuela |