Lewis & Short

Vējŏvis, Vēdiŏvis, or Vēdiiŏvis, is, m. [2. ve and Jov-; cf. Juppiter; prop. anti-Jove],

  1. I. an Etruscan divinity, a god of the under world, whose power to injure corresponded to the power of Jupiter to help; worshipped at Rome, where his temple stood in the hollow between the Arx and the Capitol; he was sometimes identified with Apollo; v. Preller, Röm. Myth. p. 235; form Vejovis, Cic. N. D. 3, 24, 62; Amm. 17, 10, 2; Mart. Cap. 1, § 58; 2, § 167; Macr. S. 3, 9.
    Form Vediovis, Ov. F. 3, 430; Varr. L. L. 5, 10, § 74 Müll.; Inscr. Orell. 1287; cf. Kal. Praenest., Mens. Jan. 1 and Mens. Mart. 7 ap. Orell. Inscr. 2, pp. 382, 386.
    Form Vediiovis, Gell. 5, 12, 11.
  2. II. With a fanciful comment on the etymology, identified with the infant Jupiter, Ov. F. 3, 447; Paul. ex Fest. p. 379 Müll.; cf. also Vedius.