Family name Forthun (Forthun 
) , throughout the world, is a rare cognomen. The surname Forthun is habitual in Norway, where it is quite a rare surname, Latvia, where it is a rare surname, and the United States, where it is a very rare surname. In absolute terms, it most frequently occurs in the United States, Norway, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Forthun | Norway, Australia, Philippines, United States, Latvia |
| louise forthun Australian artist, AU (b. 1959) |
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| ingrid forthun (b. 1963) |
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| larry f forthun researcher |
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| ingeborg forthun researcher (ORCID 0000-0001-8097-6959) |
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Mr, Ryan, Dean, Dave, Glen, Leif, Lisa, Luke, Jane, John, Joel, Jeff, Tore, Tina, Timm, Noah, Elin, Eric, Erik, Earl, Wade, Megan, Knut, Sarah, Kyle, Kari, Ms, Jo, Amy, Bob, Kal, Kim, Kip, Kym, Ron, Dan, Liz, Lue, Jan, Jay, Mary, Mark, Sara, Sean, Anna, Adam, Bjã, Karl, and Silje