Who are the people on the photo?

Addition -
By: Silvia Carolina Grünebaum

Berlin 1933

Private Collection

By: Redactie Joods Monument
With: Moritz Cohen, Klara Karoline Weijel-Cohen, Margarete Minchen Grünebaum-Cohen
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On the back of the photo is written Berlin 1933. Some people are known. Two are unknown and one is douptfull.
Who can help me identify the unknown persons.

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