Darius \d(a)-rius\ as a boy's name is pronounced da-RYE-us, DARE-ee-us. It is of Greek and Persian origin, and the meaning of Darius is "maintains possessions well". From Dareios, originally a version of the name of various ancient Persian kings. The original form of the name is Darayavahush. Historical: Darius (in Persian, Dariush) the Great assumed the kingship of Babylon after its conquest by Cyrus in fifth century BC. He was a renowned king also known as Darius the Great. Also the name of an obscure saint who was martyred at Nicaea. This name is popular with African-Americans.