Cognomen Hennagin (Hennagin 
) , in the world, is a very rare surname. The last name Hennagin is habitual in Northern America, particularly the United States, where it is a very rare surname, and Canada. Much less frequently, Hennagin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hennagin | United States, Canada |
| michael hennagin American composer (1936-1993), US (b. 1936) |
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| stephen c. hennagin Ph.D. University of California, Davis 1979 |
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Mike, Ellen, Emily, Helen, Frank, Wayne, Zayne, Andrea, Amanda, Ashley, Claire, Robert, Dennis, Daniel, Donald, Dorene, Dustin, George, Leonor, Joshua, Nathan, Edward, Norri, Nikki, Twana, Julie, Shay, Cody, Kari, Lynn, Jean, Tara, Teri, Nate, Steve, Aaron, Warren, Corey, Karen, Karla, Kevin, Kylie, Roger, David, Diane, Dylan, Linda, Jesse, Brian, and Matthew