 She was a member of the Christian Democratic Union political party.Princess Alexandra of Ysenburg and Büdingen was born on 23 October 1937 in Frankfurt am Main and was the second eldest child and only daughter of Otto Friedrich III, Prince of Ysenburg and Büdingen in Wächtersbach and his wife Felicitas Anna Eleonore Cecilie, Princess Reuss of Köstritz.Alexandra married Prince Welf Henry of Hanover, the fourth son of Ernest Augustus, Duke of Brunswick and his wife Princess Victoria Louise of Prussia, in a civil ceremony on 20 September 1960 at Büdingen, Hesse, and in a religious ceremony on the following day at the Marienkirche in Büdingen.