For 10 points, name this North Germanic ethnicity, whose rulers included Harald Bluetooth and Cnut the Great.
According to Widukind of Corvey, these people, who were defeated at Tettenhall, were converted to Christianity after a cleric named Poppo carried a heavy heated iron without being burned for one of their kings. Thynghowe was an important meeting place in a region named for these people that was centered on five boroughs. One king of these people converted to Christianity under the terms of the Treaty of (*) Wedmore, and a major history of these people's "deeds" was written by Saxo Grammaticus. One of these people, the princess Gunhilde, was killed during a massacre of them on St. Brice's day, and a leader of these people was defeated at the Battle of Edington. The tract of territory colonized by these people in eastern England was known as their "law." For 10 points, name this North Germanic ethnicity, whose rulers included Harald Bluetooth and Cnut the Great.
According to Widukind of Corvey, these people, who were defeated at Tettenhall, were converted to Christianity after a cleric named Poppo carried a heavy heated iron without being burned for one of their kings.
Danes [or Danish people; or Danskere; or Dani; or Daner; prompt on "Vikings" or "Norsemen" or "Scandinavians" or similar more general terms]