Duchess Anna of Prussia [SEP] father
Duchess Anna of Prussia
Duchess Anna of Prussia and Jülich-Cleves-Berg (3 July 1576 – 30 August 1625) was Electress consort of Brandenburg and Duchess consort of Prussia by marriage to John Sigismund, Elector of Brandenburg. She was the daughter of Albert Frederick, Duke of Prussia, and Marie Eleonore of Cleves. 
Biography.
Anna was married to John Sigismund on 30 October 1594. Before the marriage, his mother, Catherine of Brandenburg-Küstrin, pointed out that Anna was not beautiful, but the
Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach and his wife Grand Duchess Maria Pavlovna of Russia. Two years later, in 1829, Marie's younger sister Augusta would marry Charles' older brother, Wilhelm, the future Kaiser.
Charles and Marie had three children together:
- Prince Frederick Charles of Prussia (1828–1885). Married Princess Maria Anna of Anhalt-Dessau; father of Louise Margaret, Duchess of Connaught and Strathearn.
- Princess Louise of Prussia (1829–1901). Married Alexis of Hesse