Question: Danish Viking, who ruled over parts of Friesland between 841 and 873 was the uncle of a Viking leader who raided the British Isles, West Francia, Frisia, and Lotharingia in the 860s and 870?
Sentence (from "Rorik of Dorestad"): Rorik ("Roricus, Rorichus"; Old Norse "Hrørek", c. 810 – c. 880) was a Danish Viking, who ruled over parts of Friesland between 841 and 873, conquering Dorestad and Utrecht in 850.
Relevant evidence: Yes