"Duchess Sophia Charlotte of Oldenburg (2 February 1879 – 29 March 1964) was a member of the House of Holstein-Gottorp. She was the only surviving child of Frederick Augustus II, Grand Duke of Oldenburg by his first wife Princess Elisabeth Anna of Prussia.
Sophia Charlotte ("Lotte") is best known for her unhappy and well-publicized marriage to Prince Eitel Friedrich, second son of Wilhelm II, German Emperor. The marriage later led to divorce; Sophia Charlotte would remarry a few years later to Harald van Hedemann, a former police officer." - (en.wikipedia.org 17.03.2021)
en
