The Last Tsarina Alexandra of Russia with her three eldest daughters, Grand Duchesses Olga, Tatiana, and Maria.
There is some confusion between Olga and Tatiana, about which is who.
In my opinion, I think the top girl is Olga and middle girl Tatiana due to their facial features.
I really wish there is a full scan of Anastasia and Alexei's portraits. I know they exist. [link]b&w Kaulbach portraits coloured by me. Full photos of Olga and Maria on Twitter: [link]