I've been trying to look up information about the etymology of the star name Antares (Bayer designation α Scorpii, also known by the epithet "the heart of the scorpion"). The name seems to go back to Greek ἀντάρης, ου, but I want to know its original derivation and how it got from Greek to English. Wikipedia says that the Greek name comes from the Ancient Greek name of the God Ares: Ἄρης, which has the genitive Ἄρεως (a type of irregular declension that is not seen in the star name, as far as I know). If this etymology is true, the first part comes from the preposition ἀντί "against" with elision of the final vowel. But the source cited is "The Arkana Dictionary of Astrology", and I'm not totally sure whether this is a reliable source for etymologies. A dictionary from 1671, The new world of words: or a General English dictionary, marks the word as deriving from Arabic, but I'm also suspicious about the accuracy of this source. Wiktionary says that the current Arabic name of the star is qalb al-ʿaqrab, literally "the scorpion's heart", which isn't a plausible source of the form "Antares".