Surname אוסר (Oeser 
, אוסר 
) , around the world, is quite a rare last name. The last name אוסר is habitual in Germany, where it is quite a rare surname, Slovakia, where it is a rare surname, and Czechia. Not in comparison with a country's population, it is commonest in Germany, the United States, and Slovakia. Very seldom, אוסר is the forename as well as the last name.