"Frederica of Mecklenburg-Strelitz (Friederike Louise Caroline Sophie Charlotte Alexandrine) (3 March 1778 – 29 June 1841) was a German princess who became, by marriage, princess of Prussia, princess of Solms-Braunfels, Duchess of Cumberland in Britain and Queen of Hanover (in Germany) as the consort of Ernest Augustus, King of Hanover (the fifth son and eighth child of King George III).
She was born in the Altes Palais of Hanover as the fifth daughter of Charles II, Duke of Mecklenburg-Strelitz, and his first wife, Frederica, daughter of Prince George William of Hesse-Darmstadt.
Her father assumed the title of Grand Duke of Mecklenburg on 18 June 1815. Duchess Frederica was the niece of her future mother-in-law, Queen Charlotte, through her father." - (en.wikipedia.org 05.11.2019)