Sól (Old Norse "Sun") or Sunna (Old High German, and existing as an Old Norse and Icelandic synonym) is the Sun personified in Germanic mythology. One of the two Old High German Merseburg Incantations, written in the 9th or 10th century CE, attests that Sunna is the sister of Sinthgunt. In Norse mythology, Sól is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.
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.
One of the two Merseburg Incantations (the "horse cure"), recorded in Old High German, mentions Sunna, who is described as having a sister, Sinthgunt. The incantation describes how Phol and Wodan rode to a wood, and there Balder's foal sprained its foot. Sinthgunt sang charms, her sister Sunna sang charms, Friia sang charms, her sister Volla sang charms, and finally Wodan sang charms, followed by a verse describing the healing of the foal's bone