How long has Princess Margaretha of Liechtenstein's brother reigned as Grand Duke?
Princess Margaretha of Liechtenstein Princess Margaretha of Liechtenstein (born "Princess Margaretha of Luxembourg" on 15 May 1957) is the fourth child and second daughter of Grand Duke Jean of Luxembourg and Princess Joséphine Charlotte of Belgium. As the sister of Grand Duke Henri of Luxembourg and the sister-in-law of Prince Hans-Adam II of Liechtenstein, she is a princess of two current realms and a member of the Luxembourg and Liechtenstein reigning dynasties. The Princess holds similar precedence in both monarchies, as sister and sister-in-law of the Sovereign.
Sophie, Princess of Windisch-Graetz Sophie, Princess of Windisch-Graetz (born Sophie Franziska Maria Germaine of Habsburg-Lorraine, Archduchess of Austria, 19 January 1959) is a member by birth of the House of Habsburg-Lorraine, and by marriage of the Austrian House of Windisch-Graetz.