Max Beckmann and the Jewish families searching for Nazi-looted art

1. German Lost Art Foundation lists 97 entries for Max Beckmann

Jewish families searching for Beckmann paintings and drawings include:

1. Aufricht, Ernst Josef
2. Buchthal, Eugen Moritz und Therese (Thea)
3. Dittmayer (Familie)
4. Eisenmann, Margarete (geb. Ledermann)
5. Flersheim, Martin und Florence
6. Glaser, Prof. Dr. Curt

1. Kantorowicz, Hermann und Elsa Ulrike (geb. Czapski)
2. Lachmann-Mosse, Hans
3. Ploschitzki, Johanna (geb. Zender)
4. Posen, Anna und Sidney
5. Speyer, Peter Ernst Hans Willy
6. 
   
7. 
   

(The Flechtheim family had filed claims but are not in the Lost Art list)

Did the Musée de l'Orangerie make a spelling error in the name of a Holocaust victim in the provenance of this Cézanne?

Max Silberberg was a Jewish art collector in Breslau murdered by the Nazis.

Is he the same person as "Silbergerg" in the provenance text of "Fruits, serviette et boîte à lait" by Paul Cézanne?