Hi John,
Henri (Hartog) married Ann Gladwin on 2 April 1823 at St Botolph's Church, Bishopgate, London. They had 5 children - do you have all the children?
Henri's father was Ephraim van Emden and he married Diena van Laun, daughter of Hartog van Laun and Rachel de Lemon, on 29 May 1789. She was born 1763 in Holland and died 8 August 1847 in Amsterdam. They had 8 Children - the other 7 were: Isaac, born 8 July 1790 in Amsterdam, died 21 August 1828; Abraham, born 13 April 1794, Amsterdam, married Sara van Lier 24 June 1836 Amsterdam; Marcus, born 18 May 1796; Elias (Ernst) Egbert, born 22 February 1799; Levy Ephraim (Bartus), born 1803 Amsterdam; Rachel (Raadje), born 1804 Amsterdam; Elias (or Egbert) born unknown.
Ephraim was born 22 November 1752 in Amsterdam and died 15 June 1842 in Amsterdam.
Ephraim's father was Isaak Abraham van Emden who married Sara Bartus Ephraims. They had another child, Bella van Emden. Isaak Abraham van Emden's father was Abraham Alexander van Emden, born 1699 and died 12 March 1776, who married Rachel Italiaander. They also had 2 other children, Rebecca and Magdalena. Abraham Alexander van Emden's father was Abraham Joseps van Emden, born 1653 in Germany (presumably the name then would have been von Emden). He married Marianne Italiaander. They had 7 children - the other 6 were: Hartog Alexander, Joseph, Rebecca, Rachel, Mordechay and Benjamin.
Hope this is of help.
Yvonne