Ernest Lilienthal (b. 1910-d.1993) was the son of Samuel Lilienthal and Alice Haas. He served, for a time, as president and chairman of the board of Haas Brothers.
The collection consists of photographs taken of members of the Haas-Lilienthal family and other prominent San Francisco families. Includes photographs of Jesse Warren Lilienthal, Ernest Reuben Lilienthal, Louis Sloss, and Milton Esberg. Also contains a photograph of Gustave Niebaum, Lewis Gerstle, and Louis Sloss in the San Francisco office of the Alaska Commercial Company.