Cognomen Ипен (Ippen 
, Huppen 
, Ипен 
) , all over the world, is a rare last name. The surname Ипен is characteristic of Western Europe, particularly Germany, where it is a rare surname, Austria, and Netherlands. Measured by absolute frequency, it is commonest in Germany, the United States, and Netherlands. Very seldom, Ипен is the forename as well as the last name.