Question: Who is Princess Louise Of Schleswig-Holstein-Sonderburg-Glücksburg's paternal grandfather?
Sentence (from "Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg"): Friedrich inherited the title of Duke of Schleswig-Holstein-Sonderburg-Glücksburg upon his childless brother Karl's death on 14 October 1878.
Relevant evidence: No