Surname Остен (Osten 
, Остен 
) , in the entire world, is quite a rare cognomen. The last name Остен is habitual in Germany, where it is quite a rare surname, Denmark, where it is a rare surname, and Czechia. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Brazil. Very seldom, Остен is the forename as well as the last name.