Cognomen Koesen (Koesen 
, Kösen 
) , worldwide, is quite a rare family name. The cognomen Koesen is characteristic of Turkey, where it is quite a rare surname, Netherlands, where it is a rare surname, and Indonesia. Much less frequently, Koesen is the forename as well as the last name.
| mathilda koesen Dutch Righteous Among the Nations, NL (b. 1911) |
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| franciscus koesen NL (b. 1909) |
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