Isaac's son Samson/Samuel continued to live in London and in 1836 married Matilda Moss at the Hambro Synagogue. Samuel was also a sponge dealer. He and Matilda had 8 children. Samuel was a committee member of Hambro Synagogue. Matilda died in London in 1882 and Samuel died in London in 1889.
Four of their sons, John and Albert, and Benjamin and Isaac carried on the family business importing sponges. Their businesses were registered at 17 and 124 Houndsditch, London. In the 1880s in London there were eight Sponge Merchants of whom five were Jewish and 49 Sponge Manufactures of whom 13 were Jewish. So the brothers would have been well known and prosperous.
There is no trace of Isaac's oldest son Jacob.