Dion \dion\ as a boy's name (also used as girl's name Dion), is pronounced DYE-on, DEE-on. It is of Greek origin. Short form of Dionysius. Diandre and Diondre are blends of Dion and Andre. Singer Dion (of Dion and the Belmonts); football player Deion Sanders.
For more information, see also the related name Dennis.