Cognomen Lykken (Lykken 
) , throughout the world, is a rare surname. The surname Lykken is habitual in Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States, where it is a very rare surname. Not in comparison with a country's population, it is commonest in the United States, Norway, and Canada.
| VARIANT | COUNTRY |
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| Lykken | Norway, Canada, Philippines, United States, Denmark |
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knut lykken NO (b. 1831) |
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henry g. lykken American inventor (b. 1880) |
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david t. lykken American behavioral geneticist (1928-2006), US (b. 1928) |
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joseph lykken American physicist, US (b. 1957) |
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| glenn i. lykken Ph.D. The University of North Carolina at Chapel Hill |
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| erik lykken researcher |
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| joseph david lykken Ph.D. Massachusetts Institute of Technology 1982 |
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Mr, Alec, Arlo, Adam, Adin, Chad, Cass, Brad, Bill, Karl, Kurt, Kyle, Knut, Paul, Ross, Ryan, Dean, Dawn, Gary, Gene, Lisa, Luke, Alex, Sean, Shea, Sara, Ms, Ana, Art, Amy, Ava, Kim, Pam, Dan, Dag, Gay, Jana, Lee, Jon, Joe, Joy, Tim, Marc, Mary, Mark, Mads, Mike, Myra, Jae, and Jake