I.a surname of Mars: “(Numa) Salios item duodecim Marti Gradivo legit,” Liv. 1, 20, 4: “rex Gradive,” Verg. A. 10, 542: “Nymphas venerabar agrestes Gradivumque patrem,” id. ib. 3, 35: “Homericus,” Juv. 13, 113: “jure venis, Gradive,” Ov. F. 2, 861; Juv. 2, 128; so absol.: “Gradivus,” id. ib. 3, 677; 5, 556; id. M. 14, 820; 15, 863.
Grādīvus (once Grădīvus , Ov. M. 6, 427), i, m. perh. from gradior, he who steps forth, marches out,