Surname Křen (Křen 
, Krejn 
) , throughout the world, is a rare cognomen. The surname Křen is habitual in Czechia, where it is quite a rare surname, and Argentina, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Křen | Czechia |
| Krejn | Argentina |
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karel křen CZ (b. 1861) |
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jan křen Czech historian, CZ (b. 1930) |
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| jan křen CZ (b. 1872) |
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| josef křen CZ (b. 1898) |
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| václav křen CZ (b. 1898) |
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ivo křen Czech artist, CZ (b. 1964) |
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| vlastimil křen Czechoslovak composer, CZ (b. 1917) |
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| mirko křen Czechoslovak photographer (1920-1968), CZ (b. 1920) |
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| václav křen (b. 1912) |
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| jan křen CZ (b. 1923) |
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| jaroslav křen CZ (b. 1925) |
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| eduard křen (b. 1930) |
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| vladimír křen CZ (b. 1931) |
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| vladimír křen researcher (b. 1956) |
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| jiří křen CZ (b. 1947) |
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