Question: Who is Princess Marie Frederica Of Hesse-Kassel's maternal grandfather?
Sentence (from "Princess Augusta of Prussia"): Princess Augusta of Prussia (Christine Friederike Auguste; 1 May 1780 – 19 February 1841) was a German salonist, painter, and Electress consort of Hesse by marriage to William II, Elector of Hesse.
Relevant evidence: No