Martha Bryan Schott Whitney was the great-granddaughter of Timothy Matlack, the sitter in a portrait attributed to Rembrandt Peale in the NGA collection (1947.17.10). Her mother Rebecca Bryan Schott (Mrs. James Schott, 1787-1871), was the daughter of Matlack's daughter Martha Matlack Bryan (Mrs. Guy Bryan, 1770-1814).