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 Amalie Ludowika Finck von Finckenstein Countess Amalie Ludowika Finck von Finckenstein (3 February 174015 December 1771) was born in East Prussia as the daughter of Count Elias Ernst Finck von Finckenstein and Marie Luise von Reichau. She married Count Christian Louis Casimir of Sayn-Wittgenstein-Ludwigsburg on his 38th birthday. On 6 January 1769 in Berlin she gave birth to one son Prince Peter Khristianovich Wittgenstein, who went on to become a famous Russian Field Marshal.