Hostīlĭus, a, name of a Roman gens. 1. Hostus Hostilius, who fought victoriously against the Sabines, Liv. 1, 12.—2. His grandson, Tullus Hostilius, the third king of Rome, Liv. 1, 22 sqq.; Cic. N. D. 2, 3, 9.—3. L. Hostilius Tubulus, prœtor in A. U. C. 611, a rude person, Lucil. ap. Cic. N. D. 1, 23, 63. —II. Deriv. Hostīlĭus, a, um, adj., of or belonging to a Hostilius, Hostilian: Curia,
built by king Tullus Hostilius
, Liv. 1, 22; 30; Varr. L. L. 5, 155 Müll.: Hostiliis Laribus immolabant, quod ab his hostes arceri putabant (perhaps named after Hostus Hostilius), Paul. ex Fest. p. 102 Müll.: lex, Just. Inst. 4, 10.