King Sigurd married Malmfrid, a daughter of King Harald Valdemarson,
eastward in Novgorod. King Harald Valdemarson's mother was Queen Gyda
the Old, a daughter of the Swedish king, Inge Steinkelson. Harald
Valdemarson's other daughter, sister to Malmfrid, was Ingebjorg, who was
married to Canute Lavard, a son of the Danish king, Eirik the Good, and
grandson of King Svein Ulfson. Canute's and Ingebjorg's children were,
the Danish king, Valdemar, who came to the Danish kingdom after Svein
Eirikson; and daughters Margaret, Christina, and Catherine. Margaret was
married to Stig Hvitaled; and their daughter was Christina, married to
the Swedish king, Karl Sorkvison, and their son was King Sorkver.