Namesakes
Demetrius I of Alexandria
(a.k.a. Dêmêtrios) (m) 1xx-230 
Coptic Popes and Patriarchs of Alexandria 188-230
Saints
Demetrius II
(a.k.a. Dêmêtrios) (m) 1xxx-1870
Coptic Popes and Patriarchs of Alexandria 1861-1870
Lucas Papademos
(a.k.a. Demetrios) (m) 1947-
Greek Prime Ministers 2011-2012