Hijman (Herman) Wallach, his spouse Froukje, their daughter Corrie (Cornelia), their son Isidoor and his wife Justine, are remembered on a memorial stone on the grave of a child who survived the war on the Jewish cemetery Kerkehout in Wassenaar.
In addition, a Jokos file (number 34252) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.