Cognomen Tretter (Tretter 
) , throughout the world, is quite a rare family name. The surname Tretter is habitual in Austria, where it is quite a rare surname, Germany, and Czechia, where it is a rare surname. In absolute terms, this name is the most popular in Germany, the United States, and Austria. Much less frequently, Tretter is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tretter | Germany, Czechia, Austria, Italy, United States |
| marcin tretter (b. 1450) |
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| georg tretter HU (b. 1804) |
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anton tretter (b. 1866) |
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| helene gusta tretter holocaust victim, b. 1856-05-15, AT (b. 1856) |
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| antonín tretter (b. 1912) |
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mathias tretter German author, DE (b. 1972) |
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| johann tretter AT (b. 1923) |
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j. c. tretter American football player (born 1991), US (b. 1991) |
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| franco tretter Italian politician, IT (b. 1944) |
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| felix tretter Austrian psychotherapist and psychiatrist, AT (b. 1949) |
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| steven a. tretter (b. 1940) |
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| hannes tretter Austrian lawyer, AT (b. 1951) |
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| miloš tretter CZ (b. 1944) |
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| jean-nickolaus tretter (b. 1946) |
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| christiane tretter German mathematician and mathematical physicist (b. 1964) |
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