Last name Zwitter (Zwitter 
) , globally, is a rare cognomen. The cognomen Zwitter is habitual in Slovenia, where it is quite a rare surname, Austria, where it is a rare surname, and Germany, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Austria, Slovenia, and the United States.
| VARIANT | COUNTRY |
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| Zwitter | Germany, Austria, Mexico, United States, Slovenia |
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fran zwitter Slovenian historian, SI (b. 1905) |
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franci zwitter Slovene lawyer (1913-1994), AT (b. 1913) |
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| vinko zwitter Austrian editor (1904-1977), AT (b. 1904) |
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t. zwitter Slovene astronomer, SI (b. 1961) |
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| matjaz zwitter researcher |
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| andrej zwitter Dean of Faculty Campus Fryslân / Prof. of Governance and Innovation |
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| alek zwitter (b. 1974) |
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| matjaž zwitter SI |
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| andrej janko zwitter AT |
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| savina zwitter SI |
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| marco zwitter |
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| žiga zwitter SI (b. 1987) |
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Mr, Barton, Robert, Ronald, Regina, Deanna, Lauren, Joseph, Norman, Hannah, Mallory, Michael, Shannon, Colleen, Rebecca, Jeffrey, Zachary, Marilynn, Benjamin, Stephanie, Andrej, Sharon, Sabina, Miriam, Ms, Sue, Jim, Mary, Paul, Deva, Lynn, Jack, Judy, Katherine, Zack, Susan, Kevin, Dejan, David, Lifad, Janko, James, Jayne, Tanya, Megan, and Bartholomew