Cognomen Gaastra (Gaastra 
) , all over the world, is a rare surname. The family name Gaastra is characteristic of Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Germany. Measured by absolute frequency, it is commonest in Netherlands, Germany, and the United States. Much less frequently, Gaastra is the forename as well as the last name.
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| Gaastra | Belgium, United Kingdom, Netherlands, Germany, United States |
| sjoerd tabes gaastra NL (b. 1802) |
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| t. charles gaastra Dutch architect, US (b. 1879) |
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| douwe gaastra Dutch Righteous Among the Nations, NL (b. 1880) |
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| andries gaastra NL (b. 1879) |
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| jikke gaastra Dutch speed skater, NL (b. 1889) |
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| jacobus gaastra NL (b. 1913) |
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gerrit gaastra Gerrit Gaastra, teacher at the Zuiderschool (Giethoorn, the Netherlands) during 1945-1947, NL |
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| femme gaastra maritime historian, NL (b. 1945) |
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| wim gaastra Dutch university teacher, NL (b. 1948) |
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| andries gaastra NL (b. 1940) |
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| ronald gaastra Dutch swimmer, NL (b. 1959) |
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| jane gaastra researcher ORCID ID = 0000-0003-4782-9337 |
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| sieuwerd jelle gaastra Ph.D. University of California, San Diego 2017 |
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| ben gaastra researcher ORCID ID = 0000-0002-7517-6882 |
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| adriaan gaastra (b. 1975) |
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