Cognomen Ringdahl (Ringdahl 
) , throughout the world, is quite a rare last name. The surname Ringdahl is characteristic of Northern Europe, particularly Sweden, where it is quite a rare surname, Latvia, where it is a rare surname, and Norway. Measured by absolute frequency, this name is the most popular in Sweden, the United States, and Canada.
| VARIANT | COUNTRY |
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| Ringdahl | Norway, Canada, Sweden, New Zealand, United States |
| johan ringdahl SE (b. 1813) |
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| oscar ringdahl Swedish entomologist (b. 1885) |
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| ebba ringdahl Swedish actress, SE (b. 1905) |
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| astrid ringdahl (b. 1912) |
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| gerald ringdahl victim of the COVID-19 pandemic: Taught junior high science and math and farmed full time., US (b. 1932) |
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| ola ringdahl Swedish writer, SE (b. 1972) |
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| ola ringdahl researcher (ORCID 0000-0002-4600-8652) |
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| shelby ringdahl Beauty pageant winner, US (b. 1992) |
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