Archaeologists in Denmark recently uncovered 30 Viking graves—a remarkable find on its own. Related Story An Excavation Found a 1,000-Year-Old Viking AmuletThe king of Denmark reigned from roughly 958 A.D. to 986 A.D., and also served briefly as king of Norway. During his rule, Bluetooth united the tribes of Denmark into a single entity and introduced Christianity into Danish society. Kardach thought the name was a perfect fit for the technology he was developing—something designed to unite different devices, much like King Bluetooth had united warring factions. The fact that this powerful figure likely lived during a pivotal moment in Danish history makes the discovery especially significant.