Question: Who is Magnus, Prince Of Anhalt-Köthen's paternal grandfather?
Sentence (from "Adolph I, Prince of Anhalt-Köthen"): Adolph I, Prince of Anhalt-Köthen (died Zerbst, 28 August 1473), was a German prince of the House of Ascania and ruler of the principality of Anhalt-Köthen.
Relevant evidence: No