Harald Bluetooth

'''Harald "Bluetooth" Gormsson (born c. 935) was a King of Denmark and Norway. During the 10th century, Harald became an ally of Styrbjörn the Strong against his uncle, King Eric of Sweden, after the young warrior offered him the hand of his sister, Gyrid.

Harald was somehow in possession of one of the prongs of the Trident of Eden.

Reference

 * Assassin's Creed: Last Descendants