Family name ジェラン (Geslin 
, Gerrans 
, ジェラン) , in the world, is quite a common surname. The cognomen ジェラン is characteristic of France, where it is quite a rare surname, Haiti, where it is a rare surname, and Australia. Not in comparison with a country's population, it most frequently occurs in France, the United States, and Haiti. Very seldom, ジェラン is the forename as well as the last name.