Overview
Princess Helen of Waldeck and Pyrmont (Helen Frederica Augusta; 17 February 1861 – 1 September 1922), later Duchess of Albany VA, CI, RRC, GCStJ, was a member of the British royal family by marriage. She was the fifth daughter and child of George Victor, Prince of Waldeck and Pyrmont, and his first wife, Princess Helena of Nassau.
Family
Helen was born in Arolsen, capital of Waldeck principality, in Germany.
She was the sister of Friedrich, last reigning Prince of Waldeck and Pyrmont; Marie, the first wife of William II of Württemberg; and of Emma, queen consort of William III of the Netherlands (and mother of Queen Wilhelmina).
Marriage
Along with Emma and a third sister, Pauline, Helen was considered as a second wife for William III of the Netherlands. She later met with Prince Leopold, Duke of Albany, youngest son of Queen Victoria, at the suggestion of his mother. The two became engaged in November 1881.
From Wikipedia (CC BY-SA 4.0).