Decius ( grc-gre, Δέκιος, Dékios) was

Exarch of Ravenna The Exarchate of Ravenna ( la, Exarchatus Ravennatis; el, Εξαρχάτο της Ραβέννας) or of Italy was a lordship of the Eastern Roman Empire (Byzantine Empire) in Italy, from 584 to 751, when the last exarch was put to death by the ...

from October 584 to 585. He is thought to have been the first exarch of Ravenna, although some believe that

Baduarius Baduarius ( el, Βαδουάριος) was an East Roman aristocrat, the son-in-law of Byzantine emperor Justin II (r. 565–578). Theophanes the Confessor erroneously calls him a brother of the Emperor.. Biography Possibly the son or grandson of ...

had been exarch before him.

References

6th-century exarchs of Ravenna {{Byzantine-bio-stub