Eleuthere was a student of Lavoisier who emigrated to the United Stated in 1804, where he built the gunpowder mill that would become the source of the family's fortune.  
Samuel was a union admiral in the American civil war and the namesake of a neighborhood in Washington, D.C.  Pierre Samuel was an economist credited with coining the word "physiocrat," and Pete was an unsuccessful candidate for the Republican presidential nomination in 1988.  Eleuthere was a student of Lavoisier who emigrated to the United Stated in 1804, where he built the gunpowder mill that would become the source of the family's fortune.  For 10 points identify this family, whose namesake company has long dominated business and politics in the state of Delaware.
Samuel was a union admiral in the American civil war and the namesake of a neighborhood in Washington, D.C.  
Du Pont (de Nemours)