Surname Motz (Motz , Мотц ) , all over the world, is quite a common last name. The family name Motz is habitual in Eswatini, where it is quite a rare surname, Germany, and Austria. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Poland. Much less frequently, Motz is the forename as well as the last name.