Surname Jahncke (Янке 
, Jahncke 
, 扬克) , in all the world, is quite a rare family name. The family name Jahncke is characteristic of Kazakhstan, where it is quite a rare surname, Germany, and Bulgaria, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, Kazakhstan, and Russia. Very seldom, Jahncke is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Янке | Kyrgyzstan, Kazakhstan, Ukraine, Russia, Bulgaria |
| Jahncke | Peru, Sweden, United States, Germany, Poland |
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ernest l. jahncke international Olympic Committee member, US (b. 1877) |
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| paul johannes ludwig jahncke DE (b. 1860) |
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| karl jahncke DE (b. 1860) |
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| kurt jahncke German journalist and diplomat, DE (b. 1898) |
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| rolf jahncke German actor, author and voice actor, DE (b. 1923) |
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| helga marie jahncke Norwegian diplomat, US (b. 1938) |
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| frank jahncke German coxswain, DE (b. 1950) |
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| heiner jahncke DE (b. 1953) |
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| claus jahncke DE (b. 1957) |
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| helena jahncke researcher ORCID ID = 0000-0002-6668-5044 |
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| jennifer n jahncke researcher (ORCID 0000-0003-2319-6109) |
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| giso jahncke chess player (b. 1988) |
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| carl jahncke |
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Mr, Ralf, Giso, Lars, Lisa, Lois, Lynn, Jane, Josh, Judy, Hans, Otto, Zide, Marco, Morna, Molly, Minor, Susan, Alice, Alina, Anita, April, Paul, Aaron, Kurt, Bill, Ms, El, Ann, Bob, Ken, Rob, Ren, Jan, Jim, Jrg, Tom, Uwe, Marc, Mary, Maik, Stan, Alex, Anna, Anja, Anki, Carl, Karl, and Chris