Question: Who is Louis Vi, Landgrave Of Hesse-Darmstadt's maternal grandfather?
Sentence (from "Landgravine Auguste of Hesse-Homburg"): She was the sixth child and fourth daughter of Frederick V, Landgrave of Hesse- Homburg and his wife Landgravine Caroline of Hesse- Darmstadt, in turn daughter of Louis IX, Landgrave of Hesse- Darmstadt.
Relevant evidence: No