Family name Siffert (กรอง 
, Siffert 
, Сифер 
) , around the globe, is quite a rare surname. The cognomen Siffert is characteristic of Western Europe, particularly Switzerland, where it is quite a rare surname, France, and Austria, where it is a rare surname. Not in comparison with a country's population, the name is most common in France, Switzerland, and the United States. Very seldom, Siffert is the forename as well as the last name.
| VARIANT | COUNTRY |
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| กรอง | Thailand |
| Siffert | Germany, Switzerland, United States, France, Brazil |
| Сифер | Ukraine |
| charles siffert French politician (1876-1939), FR (b. 1876) |
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jo siffert Swiss racecar and motorcycle driver (1936-1971), CH (b. 1936) |
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emmanuel siffert Swiss conductor, CH (b. 1967) |
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arnaud siffert French handball player, FR (b. 1978) |
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| henrik siffert Brazilian singer, BR (b. 1959) |
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| brigitte siffert French amateur wrestler, FR (b. 1962) |
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| bernard siffert FR (b. 1961) |
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| anna siffert Dr. rer. nat. Ruhr-Universität Bochum 2012 |
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| luca siffert researcher (ORCID 0000-0001-6424-4213) |
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| hope siffert American association football player, US |
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| winfried siffert researcher |
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| rino siffert CH |
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| marie-céline siffert |
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| walter siffert |
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| louise siffert FR (b. 1988) |
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Mr, Gabi, Gert, Gina, Levi, Lisa, Liam, Luca, Luiz, Léa, Ryan, Jack, John, Joan, Joao, Jean, Jeff, Tobi, Todd, Tina, Elsa, Jose, Ruth, Rita, Reto, Ms, Jo, Sam, Amy, Pam, Dom, Jan, Joe, Eva, Marc, Mark, Sean, Alex, Alan, Anna, Curt, Beat, Brad, Paul, Rose, Rene, Eric, and Ezra