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In the entire world, Diedrich (Diedrich , Дидрих ) is quite a rare male first name. The first name Diedrich is habitual in Germany, where it is quite a rare boy's name, Nicaragua, where it is a rare boy's name, and Mexico. Measured by absolute frequency, it is the most numerous in Germany, Mexico, and the United States. More frequently, Diedrich is the last name as well as the forename.
Diedrich is also a name for the fictitious and mythical characters: Diedrich Knickerbocker , the fictional character, A History of New York.