In both the "Poetic Edda" and the "Prose Edda" she is described as the sister of the personified moon, Máni, is the daughter of Mundilfari, is at times referred to as "Álfröðull", and is foretold to be killed by a monstrous wolf during the events of Ragnarök, though beforehand she will have given birth to a daughter who continues her mother's course through the heavens. In the "Prose Edda", she is additionally described as the wife of Glenr. As a proper noun, Sól appears throughout Old Norse literature. Scholars have produced theories about the development of the goddess from potential Nordic Bronze Age and Proto-Indo-European roots.