Ragnar Lodbrok (765 - 845) Sigurdsson, King of Dacia (Denmark) Put to death in a snakepit by his enemy, King AElla of Northumbria, after he invaded England. In retaliation by Ragnar's sons. AElla was later killed via the bloody gruesome Blood Eagle. Ragnar is perhaps my 31st great grand uncle, if he actually lived.
Rollo (played by Clive Standen) is the brother of Ragnar Lothbrok in the History channel's historical drama series Vikings - he is based on the real life historical figure who was the great-great-great-grandfather of William the Conquerer
Ragnar Lodbrok met his end in England when he was captured by his long-time nemesis King Ælla of Northumbria who threw him into a pit of snakes. The Saga Ragnarssona þáttr (The Tale of Ragnar’s Sons) relates that it was this act that caused the Great Heathen Army to invade England at the behest of Ragnar’s children who demanded revenge for the death of their father.