Question: Who is Anne Eleonore Of Hesse-Darmstadt's maternal grandfather?
Sentence (from "Louis VI, Landgrave of Hesse-Darmstadt"): Louis VI of Hesse-Darmstadt  (25 January 1630 – 24 April 1678) was Landgrave of Hesse-Darmstadt from 1661 to 1678.
Relevant evidence: No