Cognomen Mertel (Mertel 
) , across the world, is quite a rare last name. The family name Mertel is characteristic of Germany, where it is quite a rare surname, Slovakia, where it is a rare surname, and Austria. Not in comparison with a country's population, it is the most numerous in Germany, Turkey, and the United States. Very seldom, Mertel is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mertel | Germany, Turkey, Austria, United States, Slovakia |
| elias mertel German musician, DE (b. 1561) |
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| christian mertel American painter (b. 1739) |
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teodolfo mertel Italian judge, deacon and cardinal (1806-1899), IT (b. 1806) |
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| georg mertel (b. 1830) |
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| johann josef mertel DE (b. 1873) |
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heinz mertel German sport shooter, DE (b. 1936) |
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| fritz mertel DE (b. 1902) |
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| holly e. mertel chemist (1920-2004), US (b. 1920) |
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| ilse mertel Austrian politician, AT (b. 1943) |
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| manfred mertel Austrian association football player, AT (b. 1954) |
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| rainer mertel DE (b. 1945) |
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| christian mertel French politician, FR (b. 1971) |
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| adam mertel researcher (ORCID 0000-0002-3634-1857) |
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| frank mertel college basketball player (1959–1959) Drake |
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| marek mertel ice hockey player (1989-), SK (b. 1989) |
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