Across the world, Joniaux (Joniaux 
) is an extremely rare boy's first name. Much more prevalently, Joniaux is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Joniaux | Brazil, Ecuador, France, United States, Belgium |
Mr, Carla, Cesar, Paola, David, Diana, Linda, Lucie, Lydie, Jaime, Julie, Henry, Fredo, Marcos, Marlon, Magali, Maxime, Sandra, Sophie, Alexia, Alesse, Andrea, Chris, Annie, Alain, Sonia, Ms, Ana, Ben, Lee, Luc, Jay, Jen, Jim, Mark, Anne, Andrew, Kara, Luis, Lynn, John, Jean, Juan, Elba, Eddy, Eric, Hugo, Maria, Lisa, and Annick