Family name Onstad (Onstad 
) , all over the world, is quite a rare cognomen. The family name Onstad is habitual in Norway, where it is quite a rare surname, the United States, where it is a rare surname, and Canada, where it is a very rare surname.
| john ragnvaldsen onstad Norwegian farmer and politician (1785-1845), NO (b. 1785) |
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otto onstad American educator and politician, US (b. 1874) |
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| marta onstad (b. 1860) |
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| katrina onstad Canadian writer, CA (b. 1901) |
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| niels onstad Norwegian shipowner and art collector, NO (b. 1909) |
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pat onstad Canadian soccer player, CA (b. 1968) |
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| kari onstad Norwegian actor and singer (1941-2020) (b. 1941) |
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| thomas onstad Swedish industrialist (b. 1953) |
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| kenton onstad American politician, US (b. 1953) |
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| chris onstad Cartoonist; Achewood |
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| haakon onstad Norwegian ship owner and art collector |
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| lynn e onstad researcher |
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| joseph allen onstad Ph.D. University of Nebraska-Lincoln 1974 |
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| nora onstad researcher (ORCID 0000-0002-0731-5561) |
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| joyce onstad candidate in United Kingdom General Election |
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