Wilhelmina Hilda Leonie de Leon (also known as Nonnie) and Georgine Elizabeth Heloise de Leon were sisters. They were the daughters of Isaac de Leon and Esther Fernandes. They were born in Paramaribo (Suriname) and had moved to the Netherlands, where they both worked as nurses.
A cousin, who had come to the Netherlands to get a European upbringing, lived with the two sisters. She survived the war and returned to Paramaribo.
Addition of a visitor of the website
For additional information (in Dutch) see the website Bevrijding Intercultureel.