Cognomen Ruygrok (Ruygrok 
) , globally, is a rare family name. The cognomen Ruygrok is habitual in Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Netherlands, the United States, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Ruygrok | South Africa, Australia, United States, Canada, Netherlands |
| jacobus johannes ruygrok NL (b. 1862) |
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| leo ruygrok composer (1889-1944), NL (b. 1889) |
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| marguerite ruygrok Australian swimmer, AU (b. 1947) |
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| marc ruygrok Dutch sculptor, NL (b. 1953) |
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| peter n ruygrok researcher (ORCID 0000-0001-8988-900X) |
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| mark ruygrok |
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| wim ruygrok |
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| jacobus nicolaas willem adriaan ruygrok NL |
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| sven ruygrok South African actor, ZA (b. 1991) |
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