Last name Donkelaar (Donkelaar 
) , all around the world, is a rare surname. The cognomen Donkelaar is habitual in Netherlands, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Denmark, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Netherlands, the United States, and Bulgaria.
| VARIANT | COUNTRY |
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| Donkelaar | Australia, Bulgaria, United States, Denmark, Netherlands |
| a. donkelaar (b. 1904) |
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| issy ten donkelaar Dutch football player, NL (b. 1941) |
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| h. j. ten donkelaar (b. 1946) |
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| corrinus c van donkelaar researcher |
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| carlina e van donkelaar researcher (ORCID 0000-0003-0745-9909) |
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| aaron van donkelaar researcher |
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| h. donkelaar |
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| g.h. donkelaar |
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| herman donkelaar |
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| ruurd van donkelaar |
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