Rockefeller Brothers Fund
The Rockefeller Brothers Fund (RBF) is a philanthropic foundation created and run by members of the Rockefeller family. It was founded in New York City in 1940 as the primary philanthropic vehicle for the five third-generation Rockefeller brothers: John, Nelson, Laurance, Winthrop and David.
Source: Wikipedia — Rockefeller Brothers Fund (CC BY-SA 4.0)