The following is a bit of a "Nothing ventured ..." exercise!
What is known?
Christiaan van Deventer was born supposedly abt 1736 in Aldeker(c)k (= Germany?) and was a Lutheran.
His children’s names were: Catharina Jacoba, Wilhelmina, Augustina Christina & Andries Christiaan
Maria Elisabeth van Deventer was born abt 1845 in “Zoust” in Germany and was a Lutheran.
Her children’s names were: Wilhelmina, Maria Elisabeth, Fredrik Andris, Willem & Christiaan
I attempted to put some German families together, but I can’t be sure whether they are 100% correct due to the lack of access/availability to the actual German records
#1 – Soest - Sankt Petri (Evangelisch)Andreas Deventers bap 22 Mar 1653 Sankt Petri Evangelisch, Soest, Westfalen (s of David Deventers)
X Oct 1678 Sankt Petri Evangelisch, Soest, Westfalen to Anna Margaretha Hellings
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Possible children found (could be more)
Georg David Deventer(s) bap dec 1679 Sankt Petri Evangelisch, Soest, Westfalen
Johann Andreas Deventer(s) bap 28 Jul 1682 Sankt Petri Evangelisch, Soest, Westfalen
Johan Christianus Deventer(s) bap 27 Aug 1687 Sankt Petri Evangelisch, Soest, Westfalen, d 21 Aug 1736 (Petri) (Occ: Gold worker)
Maybe: Henrichs Deventers bap 3 Jun 1693, Sankt Petri Evangelisch, Soest, Westfalen
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NB “Evangelische Kirche Sankt Petri Soest” films #500910/11 are available, but need a visit to a FHC:
https://www.familysearch.org/search/catalog/182726?availability=Family%20History%20Library#2 – Aldekerk - St. Peter und Paul (RC)Georg David Deventer X Anna Catharine Gravers (Possible baptism: 9 Jun 1687 in Aldekerk)
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Children found:
Petrus Deventer bap 14 Mar 1710 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=64Andreas Joannes Deventer bap 13 Mar 1712 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=72Anna Margareta Deventer bap 29 June 1714 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=79Christina Gertrudis Deventer bap 26 Dec 1716 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=86Petronilla Deventer bap 26 Oct 1719 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=94Mechtildis Agnes Deventer bap 26 Mar 1722 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=99Joannes Abrahamus Deventer bap 3 May 1725 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=104Christianus Deventer bap 26 Jan 1728 Aldekerk, Geldern, Rhein, Preußen
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https://data.matricula-online.eu/de/deutschland/muenster/aldekerk-st-peter-und-paul/KB018/?pg=109#3 – Soest - Sankt Petri (Evangelisch)Johan Andreas Deventer d 15 Oct 1774 (Occ: Gold worker) (FYI Supposedly he was nephew of Johan Christianus Deventer(s) b 27 Aug 1687)
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Possible children found (could be more):
David Friedrich Andreas Deventer bap 23 Mar 1741 Sankt Petri Evangelisch,Soest,Westfalen d 1 Apr 1805 (Occ: Gold worker) X1775 Anna Maria Göbbel
Johann Henrich Philip Deventer bap 25 May 1743 Sankt Petri Evangelisch,Soest,Westfalen
Maria Margaretha Elisabeth Deventer bap Jan 1745 Sankt Petri Evangelisch,Soest,Westfalen
Christine Wilhelmine Catharine Deventer bap May 1747 Sankt Petri Evangelisch,Soest,Westfalen
Johann Christoph Adolph Deventer bap 7 Apr 1749 Sankt Petri Evangelisch,Soest,Westfalen
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NB “Evangelische Kirche Sankt Petri Soest” film #500911 is available, but needs a visit to a FHC:
https://www.familysearch.org/search/catalog/182726?availability=Family%20History%20Library==>
- I was a bit worried when the family #2 was having the kids baptized in a Catholic church, but when you look at e.g. Petrus’ 1710 baptism, it seems to mention something abt the Lutheran/Calvin faith.
- A lot of the first names seem to appear in all the 3 families.
The lack of available protestant records is the real issue when trying to understand the layout of these families, but could your Christiaan have been a bit older and born in 1728?
Is the Georg David in Aldekerk and the one in Soest the same person. If yes, is the Andreas Joannes in Aldekerk, the same as the Johan Andreas one in Soest? .... etc etc
PS:
"Neef" can be a nephew or a male cousin!