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Family name Klos (Klos , クロス , Клос ) , globally, is a common cognomen. The cognomen Klos is characteristic of Aland Islands, where it is quite a common surname, Poland, and Czechia, where it is quite a rare surname. In absolute terms, the name is most common in Germany, Poland, and the United States. Also, Klos is the forename as well as the last name.