Rebecca Sieff British Zionist and feminist (1890–1966) (1890–1966) Parents Hannah Cohen Michael Marks Children Daniel Sieff Marcus Sieff, Baron Sieff of Brimpton Judith Hannah Sieff Michael David Sieff Jane Sieff Siblings Mathilda Marks Simon Marks, 1st Baron Marks of Broughton Miriam Marks Elaine Marks Partners Israel Sieff, Baron Sieff
