Here are the names! It is thanks to Sergei Polunin’s tour of Italy in Summer 2019 with Sacre and Fraudulent Smile that I recognised Marian Furnica, who is one of the pas de quatre here. Marian performed in Ross Freddie Ray’s Fraudulent Smile on that tour, and kindly provided the other pd4 names: (In entrance order, I think. They switch order for the line of double tours) Tristan Ridel, Arne Vandervelde, Marian Furnica, Sascha Tcacenco