Defays

Defays is a Walloon family name of Latin origin. Notable people with the surname include:


 * Frank Defays (born 1974), Belgian football player and manager
 * Jean-Marc Defays, Belgian linguist
 * Lucien Defays (1863–1949), Belgian politician
 * Pierre Richard (real name Pierre-Richard Maurice Charles Léopold Defays, born 1934), French actor and film director