Ἴων

From earlier *Ἰᾱ́ϝων (*Iā́wōn) according to Beekes. Pokorny has speculated about a connection to a Proto-Indo-European root *wey-, expressing a shout of joy or distress, as in Ancient Greek ἰά (iá, “clamour, shout; sound, roar”). Ἰᾱ́ϝων (Iā́wōn) could mean “devotee of Apollo”, based on the cry ἰή παιών (iḗ paiṓn) uttered in his worship; the god was also called ἰήϊος (iḗïos) himself. Douglas Harper speculates that it may share a Proto-Indo-European origin with Sanskrit योनी (yonī, “womb, vagina”), a supposed reference to goddess-worshipping. Compare Mycenaean Greek 𐀂𐀊𐀺𐀚 (i-ja-wo-ne, “Ionians”), Egyptian ywnj-ꜥꜣ (“Great Ionia”), both attested in the first half of 14th century BC. More at Ionians.