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Most records from this time period have been digitized and are now available on third party sites such as Family Search and Ancestry.
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I do see them listed in the 1875 New York State and the 1880 Federal Census’ as living in Brooklyn (attached below). They are listed as Jacob Duppen and Constantia Duppen and had three sons: William, Jacobus, and Peter. I also found his death certificate information (#3390) which is available at the New York City Department of Records/Municipal Archives. It states that he died on March 5, 1891 in Brooklyn. I've attached the index listing of that record as well.
It seems like there are quite a bit of records available for them but know that sometimes names are mis-spelled, or the handwritten records are hard to read and names were indexed wrong so it can really take some digging!
We hope this information is helpful. Best of luck on your research!
Thank you so much ! Your information has been very helpful.
Because I live in the Netherlands, searching the American archives is a little bit difficult.
That‘s why I posted my question on HistoryHub.
Again, thank you very much for your information.
1 person found this helpful
1870 US Census
The child Jacobus dies 2 days after the census:
Name: Jacobus F J Duppen Age: 1 Birth Year: abt 1869 Death Date: 17 Jul 1870 Death Place: Kings, New York, USA Certificate Number: 4894
1875 NY State Census
Rosanna dies two years later:
Name: Rosanna J Duppen Age: 2 Birth Year: abt 1875 Death Date: 8 Jul 1877 Death Place: Kings, New York, USA Certificate Number: 5532
There is a 12 page probate (estate) file for Jacobus G. Duppen on familysearch.com New York, Kings County Estate Files, 1866-1923; https://familysearch.org/ark:/61903/3:1:S3GS-DJXS-WN?cc=1466356&wc=MPCH-MVH%3A44954901%2C66377401%2C67062801
There are two probate files for Constantia Scott on familysearch.com
The second file is interesting because it is made up of 130 pages of testimony from people in the Netherlands stating that Constantia wanted to remain and die in a convent there rather than in the US, but had to return to the US one more time to settle financial issues. New York, Kings County Estate Files, 1866-1923; https://familysearch.org/ark:/61903/3:1:S3HT-6W2Q-J17?cc=1466356&wc=MPH8-FMV%3A44954901%2C144103701%2C145271501
Thank you very much for your information. Yet another piece of familyhistory revealed, and quite an interesting one too.