Tryggve Olafsson (; ; born c. 928 in Ringerike – died 963 in Sotnes, Bohuslän, Västra Götaland, Sweden) was the king of Viken, Norway (Vingulmark and Rånrike).Tryggve Olavsson (Store norske leksikon) He is the son of Olaf Haraldsson Geirstadalf and grandson of Norwegian King Harald Fairhair. He is also father to Norwegian King Olaf Tryggvason.
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