Throughout the world, Sijmen (Sijmen 
) is a very rare masculine forename. The given name Sijmen is habitual in Western Europe, particularly Netherlands, where it is a rare male name. Much less frequently, Sijmen is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Sijmen | Netherlands, Belgium, United Kingdom, United States, South Africa |
| sijmen folkerts algera Dutch photographer, NL (b. 1874) |
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| sijmen barend hooghoudt Dutch physicist (1901-1953), NL (b. 1901) |
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| sijmen cremer NL (b. 1902) |
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| sijmen anne reijneveld (b. 1960) |
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| sijmen schoustra researcher |
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| sijmen a reijneveld researcher |
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Ye, Sikkens, Bergsma, Berkers, Bommezij, Kaptein, Kroezen, Philips, Roberts, Grootes, Verbeek, Oostdam, Wijbenga, Strikwerda, Schilder, Schoeman, Schouten, Bakkenes, Driessen, Lagendijk, Hendriks, Hendrikx, Weesie, Fokker, Visser, Tukker, Lam, Tol, Berg, Boer, Post, Jagt, Jong, Huls, Vonk, Breij, Hoekstra, Rijke, Lange, Vries, Vlies, Schoon, Bekhof, Bosman, Koffeman, Ruwhof, Dekker, Loonen, Groot, and Hoogenhout