Oistin mac Amlaíb

Oistin mac Amlaíb (Old Norse: Eysteinn Óláfsson) was a ninth-century Norse or Norse-Gael leader whom sometimes identified as a King of Dublin. He was a son of Amlaíb Conung and nephew of Ímar, founder of the Uí Ímair dynasty. He is sometimes identified with Thorstein the Red, a figure who features in the Norse sagas.