Coptic Popes and Patriarchs of Alexandria: 1 pope
Dionysius I (a.k.a. Dionysios)   248-264  
Olympic Medalists: 1 silver
(silver) Dionysios Kasdaglis   1896   tennis  
Saints: 2 saints
Saint Dionysius I (a.k.a. Dionysios)   c. 200-264  
Saint Dionysius (a.k.a. Dionysios)   ?-c. 300