The name Fasolt likely derives from a root similar to Old High Germanfaso, thread, and most likely refers to the long braided hair he is described as having in the Eckenlied.[1] He may have originally been a storm demon, as evidenced by a 17th-century prayer to witches at the mountain Jochgrimm outside of Bozen to cause "ffasolt" to send storms far away.[2]
Gillespie, George T. (1973). Catalogue of Persons Named in German Heroic Literature, 700-1600: Including Named Animals and Objects and Ethnic Names. Oxford: Oxford University. ISBN9780198157182.