Sowilō (rune)

The letter is a direct adoption of Old Italic (Etruscan or Latin) s (𐌔), ultimately from Greek sigma (Σ).

This continues a Proto-Indo-European alternation *suwen- vs. *sewol- (Avestan xᵛə̄ṇg vs. Latin sōl, Greek helios, Sanskrit surya, Welsh haul, Breton heol, Old Irish suil "eye"), a remnant of an archaic heteroclitic declension pattern that remained productive only in the Anatolian languages.

[citation needed] Old Norwegian ᛋ Sól er landa ljóme; lúti ek helgum dóme.

Anglo-Saxon ᛋ Sigel semannum sẏmble biþ on hihte, ðonne hi hine feriaþ ofer fisces beþ, oþ hi brimhengest bringeþ to lande.

The sun is ever a joy in the hopes of seafarers when they journey away over the fishes' bath, until the courser of the deep bears them to land.