Rhădămanthus, i, m., = Ῥαδάμανθος,
a son of Jupiter and Europa , brother of Minos , a judge in the infernal regions , Cic. Tusc. 1, 5, 10; 1, 41, 98; Ov. M. 9, 435; 439; Verg. A. 6, 566; Claud. in Rufin. 2, 480.
·noun One of the three judges of the infernal regions; figuratively, a strictly just judge. ...
Webster's Dictionary of the English Language