Cognomen Гейдон (Gaydon 
, Гейдон) , in the world, is a rare family name. The cognomen Гейдон is habitual in Estonia, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. In absolute terms, it is commonest in the United States, the United Kingdom, and France. Very seldom, Гейдон is the forename as well as the last name.