“Gaius Aurelius Valerius Diocletian” sarkin Roma ne wanda ya yi mulki daga shekara ta 284 zuwa 305 AD. An san shi da manyan gyare-gyare na gwamnatin Roma da sojoji, da kuma tsananta wa Kiristoci. Sunan "Gaius Aurelius Valerius Diocletian" za a iya rushe shi kamar haka: "Gaius" was a common Roman first name. "Aurelius" was a common Roman family. suna. “Valerius” wani sunan dangin Romawa ne na kowa. sunan “Gaius Aurelius Valerius Diocletian” yana nufin wani takamaiman mutum wanda ya zama sarkin Roma a ƙarni na 3 da farkon 4th CE.