Family name Muilwijk (Muilwijk 
) , in the entire world, is quite a rare cognomen. The surname Muilwijk is habitual in Netherlands, where it is quite a rare surname, Norway, where it is a rare surname, and Switzerland. Not in comparison with a country's population, it is commonest in Netherlands, Norway, and Germany.
| VARIANT | COUNTRY |
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| Muilwijk | Germany, China, Norway, Switzerland, Netherlands |
| jacob muilwijk (b. 1916) |
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| a. d. muilwijk (b. 1937) |
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| janpeter muilwijk Dutch visual artist and painter, NL (b. 1960) |
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| jan muilwijk Dutch entomologist, NL |
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| eline w muilwijk researcher |
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| mirthe muilwijk researcher |
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| tim muilwijk researcher |
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| ijmert muilwijk |
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| morven muilwijk |
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