Icelandic saga in the context of Saga Age

Egill's Saga or Egil's saga (Old Norse: Egils saga [ˈeɣels ˈsɑɣɑ]; Icelandic pronunciation: [ˈeijɪls ˈsaːɣa] ) is an Icelandic saga (family saga) on the lives of the clan of Egill Skallagrímsson (Anglicised as Egill Skallagrimsson), an Icelandic farmer, viking and skald. The saga spans the years c. 850–1000 and traces the family's history from Egill's grandfather to his offspring.

Its oldest manuscript (a fragment) dates back to c. 1250 AD. The saga comprises the sole source of information on the exploits of Egill, whose life is not historically recorded. Stylistic and other similarities between Egill's Saga and Heimskringla have led many scholars to believe that they were the work of the same author, Snorri Sturluson. The work is generally referred to as Egla [ˈɛkla] by Icelandic scholars.

Thyra or Thyri (Old Norse: Þyri or Þyre) was the wife of King Gorm the Old of Denmark, and one of the first queens of Denmark believed by scholars to be historical rather than legendary. She is presented in medieval sources as a wise and powerful woman who ordered the building or fortification of the Danevirke, consistent with her commemoration on multiple Viking Age runestones. These include those at Jelling which was the seat of power for her dynasty.

Although her existence is documented in Viking Age runic inscriptions, very little is known about Thyra with certainty as no other contemporary sources about her survive. Much of her story is pieced together through 12th and 13th century sources that broadly disagree with one another, such as Icelandic sagas and writings of the medieval historians Saxo Grammaticus and Sven Aggesen. When she was born and became queen is unclear, however, she likely ruled until her death in the middle of the 10th century. Historians widely agree that she and Gorm were the parents of Harald Bluetooth and likely also Canute. The Historia Norwegiæ additionally claims that they had a daughter, Gunnhild, Mother of Kings, though this is less certain.