Blácaire mac Gofrith

Blácaire mac Gofraid was a Viking leader who ruled Dublin in the 10th century. He succeeded his brother Amlaíb mac Gofraid as king in 939 after the latter left Dublin to rule Northumbria. In the early years of his reign Blácaire led raids on important Christian sites at Clonmacnoise and Armagh, but repeated attacks by the Irish of Leinster in 943 and 944 led to the sack of Dublin. A year later Blácaire was replaced as King of Dublin by his cousin Amlaíb Cuarán, who had succeeded Blácaire's brother in Northumbria in 941, but had been driven out in 944.