I can recognize most of them in the front row. The guy with the hat is Max Planck, to the right are Marie Curie, Hendrik Antoon Lorentz, Albert Einstein, then some guy who looks familiar and maybe deSitter next to him.
In the middle row on the right is Niels Bohr and next to him is (maybe) Heisenberg?, then Louis de Broglie (however you may pronounce that).
The guy in the top row third from the left could be Ehrenfest and the one fourth from the right is definitely Pauli and right of him could be Born (not sure though).