Last name Іган (Eagan 
, Іган 
) , across the world, is quite a common family name. The surname Іган is habitual in Jersey, where it is quite a common surname, the United States, where it is quite a rare surname, and Canada, where it is a rare surname. Not in comparison with a country's population, it is commonest in the United States, Canada, and Indonesia. Very seldom, Іган is the forename as well as the last name.