出典:Wiktionary
Old Latin from Proto-Italic *djous, *djowes (“day, sky; Jove”) from Proto-Indo-European *dyḗws (“sky god”, literally “the bright one”) from *dyew- (“to be bright, day sky”). Combining the root with the title Pater (“Father”) forms Old Latin Diēspiter (“Jupiter”, literally “Father Jove”) whence the nominative and vocative of later forms of Diovis are derived by analogous formation (cf. Iuppiter, Iovis). Related to diēs, dīvus, dīus, Diāna, deus. Cognates include Doric Greek Δεύς (Deús), Attic Greek Ζεύς (Zeús)—the Greek god to whom Roman Diovis is later equated.
Diovis m (genitive Diovis); third declension
Third-declension noun.
| Case | Singular | Plural |
|---|---|---|
| Nominative | Diovis | Diovēs |
| Genitive | Diovis | Diovum |
| Dative | Diovī | Diovibus |
| Accusative | Diovem | Diovēs |
| Ablative | Diove | Diovibus |
| Vocative | Diovis | Diovēs |