== 語源 ==
ディアーナという名前は、おそらくラテン語の''dīus''(「神々しい」)に由来し、最終的には「神々しい、天上の」という意味の原イタリック語の*''divios''(/''diwios''/)に由来すると考えられる。)に由来すると考えられる<ref>G.Dumézil ''La religion Romaine archaique'' Paris, 1974, part 3, chap. 1.</ref><ref>de Vaan, 2008, p168</ref>。
The name ''Dīāna'' probably derives from Latin ''dīus'' ('godly'), ultimately from [[Proto-Italic language|Proto-Italic]] [[Asterisk (historical linguistics)|*]]''divios'' (/''diwios''/), meaning 'divine, heavenly'.<ref>G.Dumézil ''La religion Romaine archaique'' Paris, 1974, part 3, chap. 1.</ref>{{Sfn|de Vaan|2008|p=168}} It stems from [[Proto-Indo-European]] ''*diwyós'' ('divine, heavenly'), formed with the stem ''*dyew-'' ('daylight sky') attached the thematic suffix -''yós''.{{snf|Mallory|Adams|2006|page=408–409}}{{Sfn|Ringe|2006|p=76}} [[Cognate]]s appear in [[Mycenaean Greece|Myceanean Greek]] ''di-wi-ja'', in [[Ancient Greek]] ''dîos'' (δῖος; 'belonging to heaven, godlike'), and in [[Sanskrit]] ''divyá'' ('heavenly' or 'celestial').{{Sfn|Beekes|2009|p=338}}
The ancient Latin writers [[Varro]] and [[Cicero]] considered the etymology of Dīāna as allied to that of ''dies'' and connected to the shine of the Moon, noting that one of her titles is Diana Lucifera ("light-bearer").