Lady Mary-Gaye Curzon born 1947; mother of Cressida Bonas and Isabella Calthorpe; daughter of Edward Curzon, 6th Earl Howe (b. 1947) Parents Grace Wakeling Edward Curzon, 6th Earl Howe Children Georgiana Anstruther-Gough-Calthorpe Cressida Bonas Isabella Calthorpe Jacobi Anstruther-Gough-Calthorpe Pandora Cooper-Key Siblings Lady Jennifer Curzon Charlotte Curzon Lady Mary Keen Partners Esmond Cooper-Key Jeffrey Bonas Christopher Shaw John Anstruther-Gough-Calthorpe