He died in 2010 and left his billion fortune to his four children in equal shares.

They are now worth at least double that 1: The Waltons: The richest family not only in America but the world, the Waltons still own more than 50 percent of Wal-Mart Stores, the firm their father, Sam Walton, founded in Bentonville, Arkansas in 1962.

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Worth an incredible $152 billion, which is $63 billion more than the second richest family, the controversial Koch brothers, the Walton family is three living children of Wal-Mart Stores founder Sam Walton, and includes the wife of son John and the two daughters of his brother and business partner James Walton.

Jacqueline Badger Mars, pictured in 2012 at a gala In Washington D. is part of the famed confectionary family who are worth $60 billion while (right) is W. Cargill, the son of a Scottish sea captain, who started Cargill, the largest private company in America, making six family members individual billionaires and as a family worth $43 billion 5th wealthiest family: Abigail Johnson, president of Fidelity Investments' mutual fund division, is pictured in Boston in this February 2002 photo: The asset management firm is altogether worth $39 billion Iconic: William Randolph Hearst Jr., (lright) with his wife return from their honeymoon with a friend.

Rockefeller Jnr., Nelson Rockfeller are now the 24th richest family in America Just make the list: Kennedy family members Rep. Kennedy (D-RI), Sergeant Shriver, Jean Kennedy Smith, Eunice Shriver, Victoria Kennedy, Sen.

Edward Kennedy (D-MA), and Kara Kennedy pictured in 2006.

Charles is worth $34 billion and David is worth the same.

The rest of their wealth is spread throughout the family3: The Mars family gets its wealth from Mars, the largest candy company in the world.

ONLY worth billion now: Once the richest family on earth the heirs of (from left) Laurance Rockefeller, Abby Rockefeller, John D.

Rockefeller III, Abby Aldrich Rockefeller, David Rockefeller, Winthrop Rockefeller, Industrialist John D.

That fortune shared between Randa Duncan Williams, Milane Frantz, Dannine Duncan Avara and Scott Duncan has now grown to billion.