The image below is of the poet Vladimir Mayakovsky.
The image below is from the book, The Fate of the Romanovs by Greg King and Penny Wilson. As far as I am concerned, it is the final authority in this entire matter.
The image below is of Alexander Yurovsky, the son of principal assassin Jacob Yurovsky. It was Alexander who provided his father's notes of 1922 to Geli Ryabov, which in turn led to the discovery of the bodies in 1979.