Question: When was Christian, Margrave Of Brandenburg-Bayreuth's mother born?
Sentence (from "Christian, Margrave of Brandenburg-Bayreuth"): Christian, Margrave of Brandenburg-Bayreuth (30 January 1581 in Cölln – 30 May 1655 in Bayreuth) was a member of the House of Hohenzollern and Margrave of Brandenburg-Kulmbach
Relevant evidence: No