Lewis & Short

Tăges, is, m., an Etrurian divinity, grandson of Jupiter; he sprang from the ploughed earth in the form of a boy, and taught the Etrurians the art of divination, Cic. Div. 2, 23, 50; Ov. M. 15, 558; Amm. 21, 1, 10; Stat. S. 5, 2, 1; Luc. 1, 637; Col. 10, 345; Serv. ad Verg. A. 8, 398; Censor. de Die Nat. 4.
Hence, Tăgētĭcus, a, um, adj., of or belonging to Tages: sacra, Carmin. ap. Macr. S. 5, 19 med.