Question: Who is the paternal grandmother of Erdmann August, Hereditary Prince Of Brandenburg-Bayreuth?
Sentence (from "Erdmann August, Hereditary Prince of Brandenburg-Bayreuth"): In fact, he was the third-born son but the only one to survive into adulthood; his two older brothers Georg Frederick (b. and d. 1608) and Christian Ernst (b. 1613 - d. 1614) died long before his own birth.
Relevant evidence: No