Family name Diepen (Diepen 
) , all around the world, is quite a rare last name. The family name Diepen is characteristic of Western Europe, particularly Netherlands, where it is quite a common surname, Liechtenstein, where it is quite a rare surname, and Belgium, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Netherlands, Germany, and the United States.
| VARIANT | COUNTRY |
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| Diepen | Belgium, Netherlands, China, United States, Germany |
| johannes nicolaas diepen politician, NL (b. 1793) |
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arnold diepen Dutch bishop (1860-1943), NL (b. 1860) |
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| johannes hendricus arnoldus diepen politician, NL (b. 1815) |
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| hubert diepen Dutch painter, NL (b. 1818) |
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r.j.a. diepen politician, NL (b. 1875) |
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| george diepen politician, NL (b. 1834) |
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| hubert adriaan diepen (b. 1860) |
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frits diepen NL (b. 1915) |
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| jan menze van diepen NL (b. 1905) |
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| petrus van diepen NL (b. 1908) |
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| herman michel diepen (b. 1908) |
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| g.a.m. diepen (b. 1910) |
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| agatha van diepen NL (b. 1912) |
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| petrus malachias van diepen (b. 1917) |
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| fred van diepen NL (b. 1929) |
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