(adjective) : Dārēus (so the best editt. of Cicero and Curtius; cf. Zumpt, Gramm. § 2) or Dā-rīus (Dărĭī, Sid. Carm. 9, 51:
* Dărīos,Aus. Ep. 5, 23, v. no. II.), ii, m., Δάρειος [a Persian word, from R. dar-, to hold: 'the sustainer of the empire,' Max. Müller, Science of Lang. 2, 220],the name of several Persian Kings,Cic. Fin. 5, 30 fin.; Plin. 6, 13, 16, § 41; Curt. and Just. passim; Ov. lb. 317; Claud. Epist. 1, 17.—*
* Meton. for the gold coin stamped under Darius, a daric, Aus. l. l.—Hence, Darīus, a, um, (late Lat.), of Darius, opes, Mart. Cap. 6, § 578.

Male Personal name
Confirmed occurences in the Roman Empire:

• Dareus (Masc), ref: PIR D 0010 | PIR ID5216
• Dareus (Masc), ref: PIR D 0011 | PIR ID5217

s. TLL