Rachel Koopman, born on 18 April 1865 in Amsterdam, was the second youngest of the 7 children of Isaac Emanuel Machiel Koopman and Rebecca Elias Pothuis. She married Jacob Winnik in Amsterdam on 29 September 1887, a son of Salomon Samson Winnik and Marianne van Lier. Jacob was born on 18 September 1863 and was a diamond polisher by profession.
After the marriage which took place in 1887, Jacob a…