Last name Youngdahl (Youngdahl 
) , worldwide, is a rare family name. The family name Youngdahl is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Youngdahl | Canada, Brazil, United States |
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oscar youngdahl American politician (1893-1946), US (b. 1893) |
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luther youngdahl American judge (1896-1978), US (b. 1896) |
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| emil s. youngdahl American politician – Minnesota -House 1927-34 (District 35), US (b. 1881) |
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| carl kerr youngdahl Ph.D. Brown University 1961 |
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