Jacob Schiff
On July 1, 1945, David Ben-Gurion asked a small gathering of American-Jewish activists at Mr. Sonneborn's apartment to send supplies to the Jewish community and its military force, the Haganah. The group became a secretive, nationwide organization led by Mr. Sonnenborn, Materials for Israel, also known as the Sonneborn Institute. Sonneborn was the fourth husband of "New York Post" owner and publisher Dorothy Schiff, a granddaughter of the American financier Jacob Schiff.