Last name Omdahl (Omdahl 
) , in all the world, is a rare family name. The surname Omdahl is habitual in Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States. Not in comparison with a country's population, it is commonest in the United States, Norway, and Australia.
| VARIANT | COUNTRY |
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| Omdahl | Norway, Canada, Australia, Spain, United States |
| samuel a. omdahl American politician, US (b. 1862) |
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jan omdahl Norwegian journalist (b. 1961) |
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| lloyd omdahl American politician from North Dakota, US (b. 1931) |
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| david omdahl American politician, US (b. 1956) |
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| ashton omdahl researcher (ORCID 0000-0001-5617-9589) |
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| ingrid omdahl Norwegian association football player |
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| jack omdahl college basketball player (1960–1962) Colorado State |
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| chris omdahl NO (b. 1991) |
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