Question: When was Christian, Margrave Of Brandenburg-Bayreuth's mother born?
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