Frontīnus, i, m., a Roman surname. So esp., Sex. Julius Frontinus, superintendent of the Roman aqueducts under Nerva, in the latter half of the first century of the Christian era; author of the works De Aquis Urbis Romae, Strategetica, De Agrorum Qualitate, and De Limitibus Agrorum, Tac. H. 4, 39; id. Agr. 17; Mart. 10, 48, 20; Plin. Ep. 4, 8, 3; 5, 1, 5; 9, 19, 1; v. Teuffel, Röm. Lit. § 322.