The Pritzker family fortune -- largely amassed from Jay Pritzker's founding of the Hyatt hotel chain and Robert Pritzker's Marmon Group -- has for decades been tied up in inheritance disputes and federal investigations. It's been said that the Pritzkers have exploited so many tax loopholes that their actual net worth is a mystery not just to the Internal Revenue Service but to many family members as well.

Earlier this year, Penny Pritzker, the daughter of Jay who for a time ran Superior Bank of Chicago, was reportedly being considered for commerce secretary by President Barack Obama. When she wasn't tapped, many speculated it was out of fear the extensive vetting process would uncover even more embarrassing tax planning. Read more on the litigious Pritzkers.

Continued: The Bronfmans