Eystein Glumra (the Clatterer), also called Eystein Ivarsson (born ca. 830 in Nord-Trøndelag, Norway) was Jarl (Earl) of Oppland and Hedmark in Norway.
The Heimskringla Saga states that Eystein Glumra is the father of Rognvald Eysteinsson and Sigurd Eysteinsson. And, that he was grandfather of Guthorm Sigurdsson and Torf-Einarr. Although the Saga does mention a few Ivars, none are said to be Eystein's father.[1] Descendents of Rognvald include Rollo, William the Conqueror and the resulting Royal Families of England.
According to the Orkneyinga Saga, Eystein the noisy was the son of Ivar the Uplanders’ earl, and grandson of Halfdan the Old. He was also father of Rognvald The Wise.[2]