Amlaíb mac Sitriuc ("Amhlaeibh, son of Sitric") or Olaf Sigtryggsson was the son of the Hiberno-Norse King of Dublin, Sigtrygg Silkbeard, a member of the Uí Ímair dynasty. His ancestors included Brian Boru, Olaf Cuaran, and Gormflaith, who were influential in medieval Ireland. He was ransomed by the Gaelic lord of Brega and later killed in England by Anglo-Saxons while on his way on pilgrimage to Rome in 1034. Some of his descendants later became the Kings of Gwynedd in Wales.