Who are the people on the photo?

Verhaal - 15 januari 2015

Door: Silvia Carolina Grünebaum

Berlin 1933

*Private Collection*
Door: Redactie Joods Monument
Met: Moritz Cohen, Klara Karoline Weijel-Cohen, Margarete Minchen Grünebaum-Cohen

Copyrights: Alle rechten voorbehouden

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.