"Princess Viktoria of Prussia (Friederike Amalia Wilhelmine Viktoria) (12 April 1866 – 13 November 1929) was the second daughter of Frederick III, German Emperor and his ...
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wife Victoria, Princess Royal, a daughter of Queen Victoria. To the public she was always Princess Viktoria, and in the family she was called Moretta or Young Vicky." - (en.wikipedia.org 13.11.2019)