Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg Danish princess (1888-1962) (1888–1962) Parents Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg Friedrich Ferdinand, Duke of Schleswig-Holstein Children Princess Caroline-Mathilde of Denmark Prince Gorm of Denmark Princess Feodora of Denmark Count Oluf of Rosenborg Princess Alexandrine-Louise of Denmark Siblings Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg Wilhelm Friedrich, Duke of Schleswig-Holstein Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Glücksburg Princess Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg Princess Viktoria Adelheid of Schleswig-Holstein Partners Prince Harald of Denmark
