This article, from the FamilySearch Wiki, addressed Netherlands censuses. There are some links that may be useful. https://www.familysearch.org/wiki/en/Netherlands_Census
I wonder if there is a connection?
Ancestry.com. Web: Netherlands, GenealogieOnline Trees Index, 1000-2015 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2014.
Ancestry.com. Netherlands, Civil Marriage Index, 1795-1950 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2016.
Ancestry.com. Netherlands, Select Births and Baptisms, 1564-1910 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2014.
I really appreciate you supplying these citations, but please note that citing ancestry sources behind a paywall is never needed: all Dutch archives offer free access to their collections, on a countrywide level combined on sites like WieWasWie and openarchives.
I will check the profiles involved and replace the non-free sources by the free ones.
This personal tree has a Willem Korpershoek married to Daphne Ann TILLIDUFF (Living Tilliduff?). There is a notice in Dutch newspapers September 1954 for the birth of Diana, daughter of Korpershoek-Tilliduff at Muizenberg, Cape, South Africa.
The personal tree has Willem's parents as Willem Korpershoek and Johanna Groen. As birth records are only public after 100 years in the Netherlands, one can only speculate that the son born to J Korpershoek-Groen, April 1930 was Willem. There also was a newspaper death notice of Johanna, who died April 21, 1930, and was cremated at the Driehuis-Westerveld cemetery on Thursday April 24.
I also found a population register record (Rotterdam) showing Willem was born April 9, 1930 in Rotterdam. Willem (1880) was married three times, First marriage ended by divorce April 1929, just before his marriage to Johanna Groen.
Press "Go to source" on the WieWasWie page to see the image of the record.
Marriages (and private son) were attached to the wrong Willem Korpershoek (1901). Should be attached to the 1880 Willem (profile to be created yet).
Profile of 1880 Willem created, Johanna connected.