Cognomen Üstün (Üstün 
) , all around the world, is a common family name. The family name Üstün is characteristic of Turkey, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Germany, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Turkey, Germany, and China. Very seldom, Üstün is the forename as well as the last name.
| galip üstün Turkish politician, TR (b. 1875) |
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| faik üstün politician, TR (b. 1884) |
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üstün dökmen Turkish scholar, psychologist, author, and television presenter, TR (b. 1954) |
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| feridun üstün Turkish politician, TR (b. 1916) |
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| ahmet üstün Turkish politician, TR (b. 1923) |
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| nevzat üstün Turkish author, TR (b. 1924) |
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| ahmet üstün Turkish singer and actor, TR (b. 1925) |
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tolga üstün Turkish paralympic sportsman, TR |
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| esin emin üstün Turkish scientist and academic, TR (b. 1936) |
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| üstün asutay Turkish actor, TR (b. 1938) |
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| üstün korugan Turkish physician, TR (b. 1940) |
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| üstün akmen Turkish author (1943-2015), TR (b. 1943) |
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| üstün ergüder TR (b. 1935) |
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| üstün dinçmen TR (b. 1936) |
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| üstün bilgen-reinart Turkish-Canadian writer, broadcaster and journalist, TR (b. 1947) |
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