Rognvald "the Møre-Earl" Eysteinsson (or Rognvaldr) was a legendary Norse figure, Jarl (Earl) of Møre in Norway, known primarily as the father of Rollo (founder of Normandy) and Sigurd Eysteinsson (Earl of Orkney), making him a key ancestor in important Viking dynasties, though details are sparse, focusing on his lineage and status rather than personal legendary exploits, existing in the shadow of his more famous descendants.

Key Aspects of Rognvald:
Jarl of Møre: He held significant power in the Møre region of Norway during the late 9th century, a period when Norway was consolidating under King Harald Fairhair.
Ancestral Figure: His fame largely stems from his children:
Rollo: The famous Viking who became the first Count of Normandy, a pivotal figure in French history.
Sigurd Eysteinsson: Established the Norse earldom in Orkney.
Legendary Status: While historical accounts confirm his existence and lineage, much of the vivid detail surrounding him comes from sagas, blending fact with legend, often emphasizing his connection to these powerful descendants.

Description (Inferred from Sagas/History): A powerful Norse chieftain, a Jarl (Earl) of great standing in Norway. A foundational figure whose lineage led to Viking settlement in Scotland (Orkney) and France (Normandy). He would have been a formidable warrior and leader, characteristic of the age, though sagas tend to focus more on his sons' achievements. In essence, Rognvald was less a hero of individual exploits like Ragnar Lothbrok, and more a respected, powerful patriarch whose legacy was cemented by the conquests and kingdoms founded by his sons.