The House of Olaf was a dynasty of Swedish origin which ruled Denmark or part of Denmark in the late 9th century and early 10th century
Olof the Brash Gyrd and Gnupa (sons of Olof) Sigtrygg Gnupasson (son of Gnupa and Asfrid, Odinkar's daughter)
The existence of Gnupa and Sigtrygg is confirmed by the two Sigtrygg Runestones.
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