С арамейского Yavan - старинное написание Їωан.
It was derived from the Old Persian Yauna for the Ionian Greeks.
Helios, also Helius (/ˈhiːlioʊs/; Ancient Greek: Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek)
Гелиос- Хеллос- Хало- Гало
Hellas or Hellada Greek: Ελλάς, Ελλάδα;
The Greek ἥλιος (from earlier ἡϝελιος /hāwelios/) is the inherited word for the Sun from Proto-Indo-European *seh₂u-el which is cognate with Latin sol, Sanskrit surya, Old English swegl, Old Norse sól, Welsh haul, Avestan hvar, etc.
The name Helen is thought to share this etymology and may express an early alternate personification of the sun among Hellenic peoples.
The female offspring of Helios were called Heliades.