Last name Klenner (Klenner 
) , all around the world, is quite a rare cognomen. The cognomen Klenner is characteristic of Austria, where it is quite a rare surname, Germany, and Chile. Much less frequently, Klenner is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Klenner | Chile, Germany, United States, Austria, Australia |
| johann anton franz klenner CZ (b. 1760) |
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hermann klenner German jurist and legal philosopher, DE (b. 1926) |
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| john klenner German-born American pianist and composer (1899-1955), US (b. 1899) |
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| august klenner CZ (b. 1893) |
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| fritz klenner Austrian politician (1906-1997), AT (b. 1906) |
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| frederick klenner American medical researcher, US (b. 1907) |
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josef klenner DE (b. 1949) |
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| helmut f. w. klenner soldier; Waffen-SS Sturmscharfuehrer, DE (b. 1914) |
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sebastian klenner German ice hockey player, DE (b. 1976) |
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jochen klenner German politician, DE (b. 1978) |
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| wolfgang klenner (b. 1921) |
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| harald klenner DE (b. 1944) |
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| friedhelm klenner (b. 1946) |
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| udo klenner German painter, DE (b. 1957) |
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| hubertus klenner German politician, DE (b. 1959) |
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