Question: What dynasty was founded by a Viking leader in the mid 9th century? (Info A: Viking leader founder, Info B: mid 9th century)
Sentence (from "Ímar"): Ímar (Old Norse: "Ívarr" ; died c. 873) was a Viking leader in Ireland and Scotland in the mid-late ninth century who founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries.
Relevant evidence: Yes