"Louise Charlotte of Brandenburg (13 September 1617 – 28 August 1676), was a Duchess consort of Courland by marriage to Duke Jacob Kettler of Courland. She was the de facto ruler of Courland during the reign of her spouse.
She was born to George William, Elector of Brandenburg and Elizabeth Charlotte of the Palatinate (1597–1660)." - (en.wikipedia.org 09.03.2020)
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