Prince Constantin Rudolf of Schönburg-Hartenstein (born 1933) (b. 1933) Parents Princess Agathe, Princess of Schönburg-Hartenstein Alexander, 5th Prince of Schönburg-Hartenstein Children Alexander Maria Constantin Pius Johannes Prinz von Schönburg-Hartenstein Siblings Aloys, Hereditary Prince von Schönburg-Hartenstein Alexander, 8th Prince of Schönburg-Hartenstein Hieronymus, 7th Prince of Schönburg-Hartenstein Partners Mathilde Harternstein