Who took the title " Grand Duke of all the Russias " by securing its independence ?
Vladimir Kirillovich , Grand Duke of Russia ( Cyrillic : Влади́мир Кири́ллович Рома́нов ; 21 April 1992 ) claimed to be the Head of the Imperial Family of Russia and Titular Emperor and Autocrat of all the Russias , from 1938 to his death .