Theodosius Florentini died in 1865.
Theodosius Florentini was born in 1808.
Theodosius Harnack died in 1889.
Theodosius of Kiev died in 10##.
Theodosius the Cenobiarch died in 529.
Theodosius Forrest died in 1784.
Theodosius of Sinai died in 1843-03.
You need to specify which one. There were three emperors called Theodosius.
Theodosius of Skopje died on 1926-02-01.
Theodosius of Tarnovo died on 1363-11-27.
Theodosius II died on 450-07-28.
Pope Theodosius I of Alexandria died in 567.
Galla - wife of Theodosius I - died in 394.