Olaf Guthfrithson
Olaf Guthfrithson (Old Norse: Óláfr Guðrøðsson; died 941), also known as Anlaf Guthfrithson, was a Norse-Gael king of Dublin who reigned from 934 until his death, succeeding his father Guthfrith, a prior ruler of Dublin and Northumbria.[1][2] A member of the Uí Ímair dynasty, he is primarily noted for assembling and leading a coalition of Norse, Scottish, and Strathclyde forces against the English king Æthelstan at the Battle of Brunanburh in 937, a decisive English victory that inflicted heavy casualties on the invaders but did not immediately undermine Olaf's hold on Dublin.[3][4] Olaf maintained control over Dublin amid ongoing conflicts with Irish kingdoms and rival Norse factions until 941, when records indicate his death, possibly during a raid in eastern Scotland or from illness.[5][6] His rule exemplified the expansive ambitions of Hiberno-Norse leaders in consolidating power across Ireland and Britain during a period of Viking fragmentation following earlier conquests.