Mrs. Joseph Dupas de Iden de Valnais, née Eunice Quincy (1760–1793), daughter of Henry Quincy (1727–1780) and distant cousin of JQA. Eunice married Valnais in 1781 while he served as French consul in Boston. He was recalled to France shortly thereafter ( Descendants of Edmund Quincy, comp. Holly, p. 8; Sibley-Shipton, Harvard Graduates , 14:667–670).