Sientje de Leeuw, born in 1884 in Steenwijk, was a daughter of the butcher Jacob Israel de Leeuw and Judith Rosenbach. 21 June 1911 she married in Steenwijk the travelling salesman in paper Elkan Kosman, a son of the travelling saesman Izak Kosman and Rosetta Rosenbach. The couple had two daughters, namely Julia Roza in 1912 and Roza in 1914.
Their daughter Julia Roza was psychologist and moved to…