Cognomen Isken (Искен 
, Isken 
) , throughout the world, is a rare family name. The last name Isken is characteristic of Kyrgyzstan, where it is quite a rare surname, Israel, and Switzerland, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Germany, Israel, and Kyrgyzstan. Very seldom, Isken is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Искен | Kazakhstan, Russia, Kyrgyzstan |
| Isken | Germany, United States, Israel, Netherlands, Switzerland |
| johannes cornelis isken Dutch photographer, NL (b. 1887) |
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| alfred isken DE (b. 1892) |
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| eduard isken German fighter ace and Knight's Cross recipient, FR (b. 1918) |
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| jürgen isken DE (b. 1955) |
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| marius isken researcher ORCID ID = 0000-0003-2464-1630 |
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| frank isken researcher |
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| carl isken |
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| lynn isken German association football player, DE (b. 1997) |
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Mr, Greg, Leah, Jack, Joan, Jean, Jill, Niyr, Noam, Ngah, Dana, Elad, Erez, Emil, Eyal, Omer, Oded, Ofra, Yael, Mazal, Molly, Eran, Moshe, Rudi, Ralf, Ms, Jo, P D, Roy, Guy, Tom, Tim, Ido, Mark, Riki, Maor, Alex, Andi, Asaf, Chad, Beau, Karl, Kori, Paul, Piet, Mona, and Sarah