Who was the wife of the eldest son of the eldest grandchild of the British Queen Victoria?
Dorothea von Salviati Dorothea von Salviati (1907–1972), was the wife of Prince Wilhelm of Prussia, the eldest son of Crown Prince Wilhelm, the eldest son and heir of the last German Emperor, Wilhelm II.
Grand Duchess Olga Alexandrovna of Russia Grand Duchess Olga Alexandrovna of Russia (Russian: О́льга Алекса́ндровна ; 13 June [O.S. 1 June] 1882 – 24 November 1960) was the youngest child and younger daughter of Emperor Alexander III of Russia and younger sister of Emperor Nicholas II.