Namesakes
Theodosius
(m) ?-269 
Saints
Flavius Theodosius
(a.k.a. Theodosius) (m) 347-395
Roman and Byzantine Emperors 379-395
Saints (Theodosius the Great)
Flavius Theodosius
(a.k.a. Theodosius) (m) 401-450
Roman and Byzantine Emperors 408-450
Theodosius of Antioch
(m) ?-412
Saints
Theodosius the Cenobiarch
(m) 423-529
Saints
Theodosius I
(m) c. 500-567
Coptic Popes and Patriarchs of Alexandria 536-567
Theodosius
(m) ?-516
Saints
Theodosius
(m) ?-554
Saints
Theodosius
(m) ?-754
Roman and Byzantine Emperors 716-717
Theodosius II
(m) 12xx-1300
Coptic Popes and Patriarchs of Alexandria 1293-1300