"Frederick Augustus II (16 November 1852 in Oldenburg – 24 February 1931 in Rastede) was the last ruling Grand Duke of Oldenburg. He married Princess Elisabeth ...
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Anna of Prussia, daughter of Princess Maria Anna of Anhalt-Dessau and Prince Frederick Charles of Prussia. After her death, he married Elisabeth Alexandrine of Mecklenburg-Schwerin." - (en.wikipedia.org 30.01.2020)
