Lina Saartje Letter was the the youngest of the four children of the in Zwolle born Aron Israel Letter and Rosette Hamburger from Nijkerk. Lina was born in Zwolle on 18 October 1906 and had an older sister yet, Helena, who was born 8 June 1901. There had been also two brothers, Karel and Sally, who have died already young and very young: Karel was 9 years old when he died in 1909 and Sally was onl…