About the Ludovicus Oudkerk and the Elsje Oudkerk-Oudkerk families.

In addition, Jokos files (numbers 12209, 61062) on this family or other family members are 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.