Svein Håkonsson held part of Norway as fief under Olof Skötkonung. In 1015 he was defeated by the claimant
Olaf Haraldsson (Olaf the Saint) and was forced to flee to Sweden with his family. From the near-contemporary chronicle of
Adam of Bremen it is known that a Gunnhildr became married to Olof Skötkonung's son and successor King
Anund Jacob (1022-c. 1050) at an unknown date. The information is found in a
scholion which says: "Gunnhildr, the widow of Anund, is not the same person as Gyda, whom Thora killed". The
scholion refers to a passage in Adam's main text which describes Gunnhildr as residing in Sweden in c. 1056, after her marriage with
Sveinn II of Denmark ended. On the basis of this
scholion it was common in older history writing to identify the Swedish and Danish Queen Gunnhildr with each other. This has been denied by historian
Sture Bolin, who, basing himself on a close reading of Adam's text, regards them as two different individuals, of whom the Danish queen was Svein Håkonsson's daughter. Two later scholars, Tore Nyberg and Carl Hallencreutz, have suggested that Gunnhildr may actually have been married to both Anund Jacob and Sveinn II. Contemporary sources do not mention any children of Gunnhildr and Anund Jacob. However, the later Danish chronicler
Saxo Grammaticus and the Icelandic annals say that "the Swedish king", by implication Anund Jacob, had a daughter by the name of
Gyda, sometimes also called Guda or Gunnhildr. It is possible that Gyda was the daughter of Anund by another woman, and that Gunnhildr was her
stepmother. However, Saxo and the Icelandic annals are both late sources, and information about Gyda's parentage may ultimately go back to a misinterpretation of Adam of Bremen's text. Gyda was, according to Adam, married to king
Sveinn II of Denmark, who had spent some time at the Swedish court during his political exile from Denmark, in about 1047. However, she soon died in 1048/49, allegedly poisoned by Sveinn's concubine Thora. == Queen of Denmark ==