His son , `` Junior , '' also gave away over $ 537 million over his lifetime , bringing the total philanthropy of just two generations of the family to over $ 1 billion from 1860 to 1960 .
His son , `` Junior '' also gave away over $ 537 million over his lifetime , bringing the total philanthropy of just two generations of the family to over $ 1 billion from 1860 to 1960 .