This family owned The Breakers in Newport, Rhode Island, and currently owns the (*) Biltmore Estate in North Carolina.
A member of this family named Consuelo married the Duke of Marlborough on her mother's orders. Another member of this family named a ship originally meant to be used as a ram to sink the CSS Virginia, and was a captain for Thomas Gibbons of Gibbons v. Ogden fame. Another member of this family once exclaimed "the public be damned!" This family owned The Breakers in Newport, Rhode Island, and currently owns the (*) Biltmore Estate in North Carolina. A member of this family supposedly told William Walker that "I won't sue you, for the law is too slow. I'll ruin you." That man first made his fortune by operatingsteamboats, resulting in his being nicknamed "The Commodore," and also built the New York Central Railroad. For10 points, name this American family of business magnate Cornelius, the namesake of a university in Tennessee. 
A member of this family named Consuelo married the Duke of Marlborough on her mother's orders.
Vanderbilt family