Family name Reegen (Reegen 
) , around the world, is a very rare last name. The cognomen Reegen is habitual in Netherlands, where it is a rare surname, Germany, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Reegen is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Reegen | Germany, South Africa, United States, Brazil, Netherlands |
| hendrik antonius ter reegen Dutch sculptor (1892-1973), NL (b. 1892) |
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| otto ferdinand ter reegen (b. 1924) |
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| jan gerard joseph ter reegen |
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| milo ter reegen NL |
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