Question: Who is Princess Louise Of Schleswig-Holstein-Sonderburg-Glücksburg's paternal grandfather?
Sentence (from "Karl, Duke of Schleswig-Holstein-Sonderburg-Glücksburg"): Karl was the eldest son of Friedrich Wilhelm, Duke of Schleswig- Holstein- Sonderburg- Glücksburg and Princess Louise Caroline of Hesse- Kassel and an elder brother of Christian IX of Denmark.
Relevant evidence: No