Possibly it is Marie, because Olga didn't have curly hair. Anastasia didn't have it ether, nor did Tatiana. Alexei and Marie were the only ones with curly hair. (the other three had tiny curls as infants and toddlers, marie had curly hair until she was about four or five -the end of toddler life) And Tatiana is only one to have a pointed jaw.
So the photo is of Tsar Nicholas with Tatiana and little Marie in the air about in 1901.

In every pic of OTMAA, I can tell who is who off the bat.
