Cognomen Couillet (Couillet 
) , all over the world, is a rare family name. The cognomen Couillet is characteristic of France, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Couillet | United States, France |
| michel couillet French politician (1913-2004), FR (b. 1913) |
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| romain couillet researcher and teacher at INRIA |
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| clément couillet French volleyball player, FR (b. 1995) |
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Mr, Lucie, Lydie, Julie, Théo, Noemy, Henri, Martin, Marcel, Manuel, Maider, Maxime, Morgan, Michel, Simone, Sophie, Alexis, Annick, Aurore, Audrey, Carole, Celine, Laura, Dylan, David, Roger, Ms, Guy, Fã, Maud, Alex, Anne, Cami, Rene, Luce, Jean, Cedric, Eric, Marie, Serge, Aline, Alain, Andre, Cathy, Cyril, Bruno, Kevin, Robin, Yves, and Claude