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Family name Donker (Donker , Dungru , Dongker ) , in all the world, is quite a rare surname. The cognomen Donker is characteristic of Netherlands, where it is quite a common surname, Belgium, where it is a rare surname, and New Zealand. Not in comparison with a country's population, the name is most common in Netherlands, Indonesia, and the United States. Much less frequently, Donker is the forename as well as the last name.