David Polak was married to Wilhelmina Frankenhuis. The couple had two married children, a son called Lion and a child that survived the war. David Polak and his wife lived in the Dorpsstraat in Bathmen, where they had a shop selling furniture, soft goods and fancy articles. David Polak sat on the board of a local music association.
H. Hamburger and J.C. Regtien, Joodse oorlogsmonumenten in de provincie Overijssel, alsmede algemene oorlogsmonumenten waarop joodse namen voorkomen. Profiel (Bedum 2002) 12
An article on the Polak family was published in Nieuw Israëlietisch Weekblad, 4 May 2007.
In addition, Jokos files (numbers 1019, 1020, 17581) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos files reveal that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 9377/21363).