Question: Who is the maternal grandfather of Princess Alexandra Victoria Of Schleswig-Holstein-Sonderburg-Glücksburg?
Sentence (from "Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg"): Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg (21 April 1887 – 15 April 1957) was a daughter of Friedrich Ferdinand, Duke of Schleswig-Holstein and his wife Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg.
Relevant evidence: Yes