Cognomen Wirthlin (Wirthlin 
) , around the world, is a rare surname. The cognomen Wirthlin is characteristic of Switzerland, 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. Much less frequently, Wirthlin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Wirthlin | Canada, France, Spain, United States, Switzerland |
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joseph l. wirthlin LDS Church bishop (1893-1963), US (b. 1893) |
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| joseph b. wirthlin Apostle of The Church of Jesus Christ of Latter-day Saints, US (b. 1917) |
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| richard wirthlin American pollster (1931-2011), US (b. 1931) |
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| leroy s. wirthlin American surgeon, US (b. 1935) |
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| rachel wirthlin academic |
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