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Son of Sigtrygg "Silkbeard" Olafsson, King of Dublin & York and Sláine Ingen Ní Briain Brother of Óláfr Sigtryggsson, King of Dublin; N.N. ferch Sitric "Silkbeard"; Cellach ferch Sitric Silkbeard; Godfrid (Guthfrith) king of Dublin Guthfrith and Ivar Sigtrygsson king of Dublin