This person is commemorated on a memorial in Vijfhuizen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.
Abraham is een zoon van Hartog Polak (Hoorn, 9 juli 1870 - A'dam, 26 november 1923) en Marianne van Santen (A'dam, 17 feb 1868 - A'dam, 15 sept 1955).
Bron SAA archiefkaart Marianne van Santen 17-2-1868
In addition, a Jokos file (number 53081) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a textile goods…