Auðr is attested in the Prose Edda, written in the 13th century by Snorri Sturluson, and in the poetry of skalds.
In the Prose Edda, Auðr is mentioned three times; once in the book Gylfaginning and twice in Skáldskaparmál.
In chapter 10 of Gylfaginning, High says that, during Nótt's marriage to Naglfari, the couple had a son, Auðr.
[2] In chapter 32 of Skáldskaparmál, means of referring to Jörð, the personified earth, are provided, including "sister of Auðr" and "sister of Dagr", the personified day.
Simek notes that Auðr is a female name in other Icelandic sources.