For David and other listers the Colyer Fergusson tree of Judah Levy/Levi and his sons includes: the sons of Lewis Levy and Dove ? and unknown- Jonas Levy b 1812 d 1894; Woolf Levy married Martha Levy ( daughter of his brother Eleazer). The Eleazer Levy line includes 2 daughters Martha and Sarah - Sarah married Barnet COHEN. This explains the Cohen/Mandelson/Woolf links to Sarah Levy. Dr Phillip Kirby Norwich Norfolk