One of the islands, Brännö, is described as an important location for fairs in the Laxdæla saga, and it is also considered to be the likely location of Breca and the Brondings of the Anglo-Saxon poems Widsith and Beowulf.
They and Breca the Bronding are mentioned in Beowulf (Th. 1047; B. 521.), as Beowulf's childhood friend, and in Widsith (Scóp Th. 51; Wíd. 25.), where Breca is the lord of the Brondings.
It is believed that its inhabitants are the same as the Brondings who are referred to in the Anglo-Saxon poems Beowulf and Widsith.
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Beowulf, England's national epic, relates that Breca the Bronding was the childhood friend of the hero Beowulf and Widsith tells that Breca later was the lord of the Brondings.
The Brondings and Breca are believed to have lived on the island of Brännö outside of modern Gothenburg, a realistic location for a childhood friend of Beowulf.