Cognomen ديونيسيوس (Dionysius 
, ديونيسيوس, Dionisij) , worldwide, is a rare surname. The family name ديونيسيوس is habitual in Luxembourg, where it is quite a rare surname, Australia, where it is a rare surname, and Singapore. Measured by absolute frequency, it is commonest in Australia, Indonesia, and the United States. More prevalently, ديونيسيوس is the forename as well as the last name.