Family name Cosnett (Cosnett 
) , throughout the world, is a rare cognomen. The cognomen Cosnett is characteristic of the United Kingdom, where it is a rare surname, New Zealand, and Australia, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in the United Kingdom, the United States, and Australia. Much less frequently, Cosnett is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cosnett | United Kingdom, Australia, South Africa, New Zealand, United States |
| john emile cosnett b.31 October 1925 d.28 November 2012 (b. 1925) |
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rick cosnett Australian actor, AU (b. 1983) |
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| elizabeth joan cosnett GB (b. 1936) |
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| john cosnett British darts player, GB (b. 1960) |
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| valerie joan cosnett Peerage person ID=426597 |
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Mr, Dean, Greg, Lucy, Jane, John, Joan, Nick, Sarah, Susan, Sonia, Alice, Anita, Abbie, Chris, Conor, Craig, Brian, Karen, Kalie, Ryan, Rick, Phil, Paul, Ms, Sue, Amy, Ben, Pat, Dan, Gil, Jay, Jai, Kerry, Jak, Ian, Mark, Matt, Mike, Sara, Adam, Karl, Kate, Katy, Tom, and Keith