Cognomen Daalen (Daalen 
) , in all the world, is quite a rare family name. The family name Daalen is characteristic of Netherlands, where it is quite a rare surname, North Macedonia, and Belgium, where it is a rare surname. Measured by absolute frequency, it is commonest in Netherlands, North Macedonia, and Germany. Much less frequently, Daalen is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Daalen | Germany, Netherlands, Belgium, United Kingdom, North Macedonia |
| j.c. van daalen (b. 1608) |
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| nicolaas van daalen (b. 1716) |
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| alb. van daalen (b. 1812) |
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| g.c.e. van daalen capitain of the Oostindisch Leger (Dutch East Indies Army), 1836-1889 (b. 1836) |
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| gerard van daalen Dutch Righteous Among the Nations, NL (b. 1878) |
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| constantijn van daalen Dutch gymnast, NL (b. 1884) |
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| hendrikje van daalen Dutch Righteous Among the Nations, NL (b. 1885) |
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| philippina van daalen Dutch Righteous Among the Nations, NL (b. 1889) |
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maria van daalen Dutch poet and writer, NL (b. 1950) |
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| coos van daalen Dutch Righteous Among the Nations, NL (b. 1917) |
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| roelof van daalen Dutch Righteous Among the Nations, NL (b. 1917) |
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| david hendrick van daalen (b. 1919) |
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| phonse van daalen NL (b. 1924) |
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| piet van daalen (b. 1924) |
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| leendert van daalen (b. 1939) |
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