The future heir will be cousin with a large number of his or her subjects. The paternal forefather of Kate, who is known as the duchess of Cambridge, were relatively well off. However “on her mother’s side she has largely working class ancestry from the English north ,’’ said Scott steward, a member of the new English historic genealogical society and the co- author of a 2011 book on Catherine Middleton’s family tree. Her family tree contains coalminers, a linen maid, bakers and a London street sweeper.