Question: Who is the paternal grandmother of Bertha, Daughter Of Charlemagne?
Sentence (from "Bertha, daughter of Charlemagne"): Bertha (c. 780 – after 11 March 824) was the seventh child and third daughter of Charlemagne, King of the Franks, by his second wife, Hildegard of the Vinzgau.
Relevant evidence: Yes