High Quality Content by WIKIPEDIA articles! Abby Aldrich Rockefeller, (October 26, 1874 – April 5, 1948), was a prominent socialite and philanthropist and the second-generation matriarch of the renowned Rockefeller family. Referred to as the "woman in the family", she was especially noteworthy for being the driving force behind the establishment of the Museum of Modern Art, on 53rd Street in New York, in November, 1929.