Constantius
Constantius or Konstantios is the name of the following people:
- Constantius I (around 250–306), Roman emperor
- Constantius II (317–361), Roman emperor
- Constantius III. († 421), Western Roman co-emperor
- Constantius Gallus (325 / 326–354), Roman under-emperor
- Constantius (consul 327) , Roman official and consul
- Constantius of Lauriacum , Bishop of Lauriacum
- Constantius of Lyon (420/430 - around 494), poet, priest and orator
- Constantius of Perugia († around 170?), Martyr and saint
- Constantius von Sonnenberg (1638–1691), from 1683 to 1691 librarian at the St. Gallen monastery
- Konstantios (co-emperor of Thomas) († 821), Byzantine usurper
- Konstantios Dukas (1060-1081), Byzantine co-emperor
