Cognomen Sieler (Sieler 
) , in the entire world, is quite a rare family name. The cognomen Sieler is habitual in Germany, where it is quite a rare surname, Austria, where it is a rare surname, and the United States. In absolute terms, this name is the most popular in Germany, the United States, and France. Much less frequently, Sieler is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sieler | Germany, Australia, Austria, France, United States |
| ferdinand sieler (b. 1795) |
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| heinrich sieler (1893-1965) (b. 1893) |
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| ernst sieler German general, DE (b. 1893) |
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| maria sieler AT (b. 1899) |
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| ruth sieler German music educator (1911-1976), DE (b. 1911) |
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| wolfgang sieler German politician (1930-2001), DE (b. 1930) |
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| sabine sieler US (b. 1925) |
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| manfred sieler DE (b. 1927) |
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zach sieler American football player (born 1995), US (b. 1995) |
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| alan sieler Australian cricketer, AU (b. 1948) |
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| miguel sieler (b. 1949) |
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| tatiana sieler researcher (ORCID 0000-0002-3885-447X) |
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| heidemarie sieler Dr. rer. nat. Friedrich-Schiller-Universität Jena 1979 |
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| maike sieler DE (b. 1973) |
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| rudolf bruno sieler |
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