Question: Who is Armin, Prince Of Lippe's maternal grandfather?
Sentence (from "Armin, Prince of Lippe"): Willa August Fürst zur Lippe"; 18 August 1924 – 20 August 2015, also in Detmold) was the son of Leopold IV, Prince of Lippe and his second wife, Princess Anna of Ysenburg and Büdingen.
Relevant evidence: Yes