Family name Clooster (Clooster 
) , worldwide, is a very rare surname. The cognomen Clooster is habitual in Belgium, where it is a rare surname, Netherlands, where it is a very rare surname, and the United States, where it is an extremely rare surname.
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| Clooster | United States, Belgium, Netherlands |
| roelina gijsberta gerardina van den clooster, vrouwe van rhebrugge 12 Apr 1746 Ruinen - 12 Jun 1824 H.Rhebrugge, Ruing (b. 1746) |
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| noël van clooster Belgian bicycle racer, BE (b. 1943) |
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| johan van den clooster Abt 1520 - 1591 |
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| herman van den clooster - 1495/1496 |
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| elisabeth van den clooster - 7 May 1602 |
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| agnes van den clooster - 1556 |
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| hero van den clooster - 20 Jun 1568 Dornum |
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| gerhard van den clooster - 1514 Appingedam |
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| margaretha van den clooster |
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| johan van den clooster |
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| reinold van den clooster, heer van de havixhorst |
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| elisabeth van den clooster |
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| occa van den clooster |
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