Surname Dellen (Dellen 
) , worldwide, is a rare family name. The cognomen Dellen is characteristic of Western Europe, particularly Netherlands, where it is quite a rare surname, Austria, where it is a rare surname, and Germany. Not in comparison with a country's population, this name is the most popular in Netherlands, Germany, and the United States. Very seldom, Dellen is the forename as well as the last name.
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| Dellen | Germany, Indonesia, Austria, United States, Netherlands |
| theo van dellen (b. 1953) |
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| h. todd van dellen American politician, US (b. 1964) |
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| alexander van dellen AT (b. 1968) |
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| christian dellen researcher ORCID ID = 0000-0003-3713-4742 |
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| david van dellen researcher |
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| edwin van dellen researcher |
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| jonathan van dellen researcher (ORCID 0000-0002-1343-6140) |
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| dellen millard Canadian serial killer, CA (b. 1985) |
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