Across the world, Questiaux (Questiaux 
) is an extremely rare unknown gender given name. Much more frequently, Questiaux is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Questiaux | Romania, Belgium, South Africa, United States, France |
Mr, Gilles, Helene, Franã, Xavier, Mikhail, Antoine, Charles, Bernard, Benoist, Kenneth, Raymond, Jacques, Tristan, Vincent, Quentin, Mathilde, Michaël, Philippe, Rosemary, Danièle, Geoffroy, Romain, Pierre, Benoit, Coline, Amy, Mary, Anna, Axel, Paul, Ryan, Dale, Lisa, Lynn, Jean, Josselin, Yann, Sarah, Alain, Cathy, Ralph, David, Laura, Elise, Marine, Michel, Albert, Marie, and Stéphane