Hester (Hetty) Fresco (front row, on the far right) next to her older sister Regina Hester Fresco on a family photo from 1931. in the middle row on the far right Louis Maurits Polak (on his father's lap (Arnold Polak)). Front row, 2nd from the left is Maurits Fresco.
A picture of the Fresco family can be found in: E. van Baarle, Vertrokken zonder nader adres: de joodse inwoners en onderduikers van Pijnacker, 1936 - 1945 (Pijnacker 2005).