Dorothea von Salviati's father-in-law was born on what date?
Dorothea von Salviati Dorothea von Salviati (1907–1972), was the wife of Prince Wilhelm of Prussia, the eldest son of Crown Prince Wilhelm, the eldest son and heir of the last German Emperor, Wilhelm II.
Countess Georgina von Wilczek Georgine "Gina" von Wilczek (Georgine Norberte Johanna Franziska Antonie Marie Raphaela; 24 October 1921 – 18 October 1989) was the daughter and only child of Ferdinand Maria, Count of Wilczek (1893–1977), and his wife, Countess Norbertine Kinsky von Wchinitz und Tettau (1888–1923). She was born in Graz, and was the mother of Prince Hans-Adam II of Liechtenstein.