Cognomen Harren (Hare 
, Harren 
) , around the globe, is a common surname. The cognomen Harren is habitual in Isle of Man, where it is quite a common surname, New Zealand, where it is quite a rare surname, and the United Kingdom. Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and India. Also, Harren is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hare | Canada, Japan, United Kingdom, United States, India |
| Harren | Kenya, Canada, United Kingdom, United States, Australia |
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harren jhoti Structural biologist, co-founder and Chief Executive Officer Astex Therapeutics, IN (b. 1962) |
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| rie harren Dutch Righteous Among the Nations, NL (b. 1915) |
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mick harren Dutch singer, NL (b. 1967) |
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| henry m. harren American politician – Minnesota -Senate 1955-62 (District 46); Senate 1963-70 (District 26), US (b. 1922) |
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| piet harren NL (b. 1914) |
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| frans j m harren researcher |
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| james harren American comics artist, US |
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| anna katharina harren researcher |
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| matthew thomas harren Ph.D. University of California, Berkeley 2007 |
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| rolf harren Dr. Max-Planck-Institut für Informatik 2010 |
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| james harren (b. 1986) |
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