Family name Gaass (Gazza 
, Gaass 
) , all over the world, is quite a rare cognomen. The last name Gaass is habitual in Italy, where it is quite a rare surname, Uruguay, where it is a rare surname, and Ghana. In absolute terms, this name is the most popular in Italy, Indonesia, and the United States. Very seldom, Gaass is the forename as well as the last name.