Théonie Rivière Mignot (Philadelphia, 2 October 1819 – 13 December 1875, Greenwich, Fairfield, Connecticut), was an American businesswoman.
[1] Théonie Rivière Mignot was the daughter of Constance Alexandrine Angot (1790-1837) and the French baron Jean-Pierre Rivière (1770-1849), a refugee from the Haitian Revolution who established himself as merchant of luxury items in Charleston, South Carolina.
In 1834, she married Rémy Mignot (1801-1848), who founded the first French restaurant in Charleston, Coffee House vid 129 East Bay Street in 1837.
She actively participated in and helped run her husband's new store and café at 160 King Street when it first opened in 1842.
During this time period, most public establishments was regarded to be foremost made for men, and The Mount Vernon was unusual as it specifically welcomed female customers.