Sophie Madeleine Dalmas (1775-1828) was the daughter of Sophie Marie Madeleine Gentil (1744-circa 1829) and Jean François Dalmas (1740-1808). E.I. du Pont and Sophie Dalmas du Pont married in 1791; the couple had eight children, one of whom died in infancy. After their marriage, Sophie du Pont lived at the du Pont family estate, Bois des Fossés, with her father-in-law while her husband worked in his father's printing shop in Paris. When her father-in-law was arrested and imprisoned in Paris in 1794, Sophie du Pont left her eldest child at Bois des Fossés with family members and went to Paris, where she remained until his release a month later. She and other family members left France in 1799, arrived in the United States in 1800, and established housekeeping in Bergen Point, New Jersey. The family relocated north of Wilmington, Delaware, along the Brandywine in 1802 and built their home, Eleutherian Mills, a gunpowder manufactory. Sophie du Pont suffered a concussion as a result of an explosion at the mills in 1818, never fully recovering; she died at Eleutherian Mills in 1828.