Ingeborg Tryggvasdotter

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Ingeborg Tryggvasdotter was the daughter of Tryggve Olafsson, the grandson of Harald Fairhair, and the sister of Olaf I of Norway.

She married Ragnvald Ulfsson, first the earl of Västergötland and later of Staraja Ladoga. They had two sons, Ulf and Eilif, who became earls in Kievan Rus'.