Izaäk Kropveld was married to Sara Mozes. On 13 December 1942 their son Manes was born in camp Westerbork.
Register of birth certificates, opgesteld op de hulpsecretarie van de burgerlijke stand in het kamp Westerbork; archief van de gemeente Westerbork, opgenomen in het archief van de gemeente Midden-Drenthe te Beilen
In addition, a Jokos file (number 9715) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
A Liro card exists for this person or family. The original cards are kept at the Nationaal Archief (National Archive) at The Hague.