Question: By what nickname was the father of George Frederick of Brandenburg-Ansbach known ? 
Sentence (from "George, Margrave of Brandenburg-Ansbach"): George of Brandenburg-Ansbach (German: "Georg or Jürgen der Fromme" ) (4 March 1484 – 27 December 1543), known as George the Pious, was a Margrave of Brandenburg-Ansbach from the House of Hohenzollern.
Relevant evidence: Yes