A brother of Esther Werkendam, Nathan Waterman, lived with his family on the opposite side of the street in the Lekstraat. The Werkendam and Waterman children often played together, and with children from other (often related) families, in a little park in their street.
Addition of a visitor of the website
In addition, a Jokos file (number 30877) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.