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Surname Petrich (Petrich , Петрич , Петрих ) , all around the world, is quite a common cognomen. The cognomen Petrich is habitual in Germany, where it is quite a rare surname, Hungary, and Argentina, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Argentina. Much less frequently, Petrich is the forename as well as the last name.