Princess Marie of Prussia, was a princess of the House of Hohenzollern. She was the daughter of Prince Frederick Charles of Prussia and later became second wife of Prince Henry of the Netherlands then the first wife of Prince Albert of Saxe-Altenburg. She was also the great-niece of Wilhelm I, German Emperor.

Prince Friedrich Karl Nikolaus of Prussia was the son of Prince Charles of Prussia (1801–1883) and his wife, Princess Marie of Saxe-Weimar-Eisenach (1808–1877). Prince Friedrich Karl was a grandson of King Frederick William III of Prussia and a nephew of Frederick William IV and William I.