Surname Toonstra (Toonstra 
) , in the entire world, is a rare cognomen. The cognomen Toonstra is characteristic of Netherlands, where it is quite a rare surname, Canada, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Toonstra | United States, Canada, Netherlands |
| johan toonstra Dutch association football player, NL (b. 1950) |
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| christine toonstra Dutch distance runner, NL (b. 1966) |
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| anne jan toonstra Dutch cabaret artist, NL (b. 1979) |
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| christian toonstra researcher (ORCID 0000-0003-1269-0291) |
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| peter toonstra |
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