Flavius Valerius Constantius I Chlorus of Rome
Flavius Valerius Constantius I Chlorus of was born in 0242.  He died in Eboracum, Britain (now York, North Yorkshire, England).

 Flavia Julia Helena
Flavia Julia was born about 0248 in Drepanon, Bithynia, Asia Minor.  She died about 0328 in Nicomedia (modern Izmit, Turkey).

 Constantine I the Great Augustus of Rome
Constantine I the Great Augustus of was born in Naissus, Moesia (now Nis/Naissus, Serbia, Yugoslavia).  He died in Ancyrona, near Nicomedia, Bithynia (now Izmit, Turkey).