Question: Who is the paternal grandfather of Natalia Alexeievna (Wilhelmina Louisa Of Hesse-Darmstadt)?
Sentence (from "Louis IX, Landgrave of Hesse-Darmstadt"): On 12 August 1741, Louis married Caroline of Zweibrücken, daughter of Christian III, Duke of Zweibrücken.
Relevant evidence: No