A. Origin and career
Roman emperor AD 284-305. Full name (first adopted after his elevation): C. Aurelius Valerius D. (CIL III 22), previously Diocles (Lactant. De mort. pers. 9,11; 19,5; 52,3; Lib. Or. 19,45f.; [Aur. Vict.] Epit. Caes. 39,1; POxy 3055). Born in 241 or 244 in Dalmatia (Malalas 311 Bonn; [Aur. Vict.] Epit. Caes. 39,1), presumably in Salona (Theoph. 10,13 de Boor). In a purely military career he advanced to the position of dux Moesiae (Zon. 12,31) and after that…