Hasculf Thorgillsson

Also Asgall mac Torcáill, (d. 1171) was the last Norse King of Dublin. His fortress is believed to have stood on the modern site of Dublin Castle. After the 1171 invasion under Strongbow, Hasculf's Kingdom was captured by Anglo-Norman mercenaries allied with King Dermot MacMurrough. He was forced to flee to the Scottish Highlands, where he raised an army among his relations there. When he returned and attempted to regain his Kingdom by force, he was defeated and killed. The Annals of the Four Masters state that he was killed in battle.

The writings of Giraldus Cambrensis, however, tell a very different story. Allegedly captured on the sands of the harbor while attempting to flee back to his ships, Hasculf paid a large ransom in exchange for his release. However, before his release could be finalised, he allegedly told his captors that they had only seen a small fraction of his power and that next season he would return with an even bigger army. The Normans responded by pocketing the ransom and beheading him in the town square.