parents :  Grand Duke Alexander Mikhailovich  (1866–1933) and  Grand Duchess Xenia Alexandrovna  (1875–1960) were first cousins once removed. Consequently Prince Dmitri was the great-grandson of Tsar  Nicholas I  (from his father's side), also the great-great-grandson of the same Tsar Nicholas I (from his mother's one), the grandson of Tsar  Alexander III  and the