In the entire world, Cosslett (Cosslett 
) is an extremely rare boy's given name. Much more frequently, Cosslett is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Cosslett | United Kingdom, Australia, South Africa, United States, New Zealand |
Mr, Jess, Jeff, Tony, Tess, Nick, Emma, Fran, Owen, Maria, Marie, Megan, Sarah, Susan, Steve, Allan, Anita, Abbie, Chris, Carol, Corey, Clare, John, Betty, Jada, Lori, Ms, Sam, Amy, Bev, Kim, Rob, Roy, Lee, Mark, Mike, Andy, Anna, Adam, Carl, Beth, Keri, Paul, Rory, Ryan, Dean, Dina, Jane, and Bonny