Alexander Duff British Member of Parliament (1657-1726) (1657–1726) Parents Christian Duff William Duff Children Janet Duff Robert Duff, 4th of Drummuir Alexander Duff James Duff Mary Duff John Duff William Duff Anne Duff William Duff, 1st of Muirtown Katherine Duff Siblings Andrew Duff Magdalen Duff Katherine Duff Margaret Duff Mary Duff Adam Duff James Duff William Duff Isabel Duff Beatrix Duff Jean Duff Partners Catharine Duff