Last name Klemmer (Klemmer 
) , worldwide, is quite a rare family name. The last name Klemmer is characteristic of Estonia, where it is quite a common surname, Germany, where it is quite a rare surname, and Austria. In absolute terms, the name is most common in Germany, the United States, and Estonia.
| VARIANT | COUNTRY |
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| Klemmer | Canada, United States, Germany, Estonia, Austria |
| christopher conrad johannes klemmer DE (b. 1834) |
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| franz klemmer German painter (1879-1964), DE (b. 1879) |
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| conrad klemmer (b. 1882) |
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| heinz klemmer German Politician (SPD), DE (b. 1921) |
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| konrad klemmer German herpetologist, DE (b. 1930) |
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| paul klemmer German economist (1935-2005), DE (b. 1935) |
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| siegrun klemmer German politician, DE (b. 1939) |
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david klemmer Australian rugby league footballer, AU (b. 1993) |
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bert klemmer Estonian association football player, EE (b. 1993) |
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| john klemmer American musician, US (b. 1946) |
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| klemens klemmer (b. 1956) |
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| axel klemmer DE (b. 1963) |
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| lukas klemmer researcher |
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| konstantin klemmer researcher ORCID ID = 0000-0002-7096-0133 |
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| cary l klemmer researcher |
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