cahn

Peter the Great with black page - at first I thought, oh, must be Pushkin's great-grandfather, but then I read the description and saw it couldn't have been because Pushkin's great grandfather was already in his 20s at that point. (He was also a fascinating character, check out his wiki entry, who lucked out within the bad luck of being a slave in that he got adopted by Peter, got to study at the university in France sponsored by him, and later was an important figure at Elizaveta's court. Otoh no one knows what became of the boy in the painting, who can't have been him.

Also, since you asked whether RussianFritz would have staged a coup against RussianFW or waited for AW's succession to stage a coup against: I think as a male prince, he wouldn't have had the luxury to wait. Russian FW would have either killed him directly or put him into a monastery. Speaking of which, SD and Wilhelmine would have ended up in nunneries in Siberia, too, as soon as those English marriage arguments got serious. As to whether Russian AW would have survved beyond a successful coup - only in the way poor Ivan and his siblings did, I fear, if he didn't get killed outright or died a few months later of some disease. (Heinrich and Ferdinand survive and stay at court by virtue of being young enough and there not being a Fritz heir around, assuming RussianFritz already has a clue he won't reproduce himself.)