Jacobus Henricus Kann and Adriana Polak Daniels had five children. One of them was Johan.
Jewish Historical Museum
In addition, a Jokos file (number 31485) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 6113/2224).