The Ladin legend cycle of the Dolomite valleys was gathered into literary form only in the early twentieth century, and no formal pantheon, priesthood or earlier textual trace survives to say how old the material already was when it was collected.
What would resolve this An earlier manuscript, inscription or outside traveler's account referencing specific Ladin mountain-spirit legends before their twentieth century literary collection would establish a real floor for the material's age.
Openfolklore studies and historical linguisticsKarl Felix Wolff, Dolomitensagen (Wolff)