Ragnvald I the Wise Eysteinsson Jarl av Uppland & de More

  Notater:

Rognvald Eysteinsson (fl. 865) sometimes referred to with the bynames of "the Wise" or "the Powerful" was the jarl of Møre in Norway and a key figure in the founding of the Norse Earldom of Orkney.

There are three conflicting sources regarding Rognvald and the creation of the Earldom of Orkney. The best known are the Norse Sagas, which scholars believe must be treated with caution: the texts were compiled three centuries after the events described and their accuracy in regard to Rognvald's life and historical significance is now questioned. Some scholars emphasise contemporary accounts, especially Irish sources, at the expense of the sagas.

In particular, recent research has cast doubt on a "great voyage" that Rognvald is supposed to have undertaken with Norwegian king Harald Fairhair. The sagas claim that the expedition travelled initially from Norway to Shetland and Orkney (to expel vikings who had been raiding Norway), before raiding the Scottish mainland, Ireland and the Isle of Man. It is now widely believed that any such voyage occurred after Rognvald's lifetime. Scholars also question the sagas' description of: the relationship between Rognvald and Harald, the names and biographies of Rognvald's immediate family and; the founding of the earldoms of Møre and Orkney. William P. L. Thomson, an authority on Orcadian history, considers that the story of the "great voyage is so thoroughly ingrained in popular and scholarly history, both ancient and modern, that it comes as a bit of a shock to realise that it might not be true.

Ragnvald blev gift med Ragnhild.