It would be nice to finally put to rest this confusion.
The wife of Adam Bemer is a direct descendant of Jan Broerseen Decker.
The wife of Casper Van Wormer is a direct descendant of Jan Gerritsen Decker:
Two Deborah Deckers Confusion
Deborah was baptized on 3 May 1743 at the Dutch Reformed Church at Machakemeck, Orange, New York.
Transcription of text
Name: Debora Dekker
Christening Date: 03 May 1743
Christening Place: DUTCH REFORMED CHURCH, MACHACKEMECK, ORANGE, NEW YORK
Father's Name: Johannes Dekker
Mother's Name: Lena Quick
Indexing Project (Batch) Number: C50649-1
System Origin: New_York-ODM , GS Film number: 599307
"New York, Births and Christenings, 1640-1962,"
index, FamilySearch (https://familysearch.org/ark:/61903/1:1:V2CH-Z4S : accessed 23 May 2015),
03 May 1743;
citing DUTCH REFORMED CHURCH, MACHACKEMECK,ORANGE,NEW YORK,
reference ; FHL microfilm 599,307.
Source Title (view source details)
New York, Genealogical Records, 1675-1920
↑ "New York, Births and Christenings, 1640-1962," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/V2CH-Z4S : accessed 25 January 2015), Debora Dekker, 03 May 1743; citing DUTCH REFORMED CHURCH,MACHACKEMECK,ORANGE,NEW YORK, reference ; FHL microfilm 599,307.
It may be possible to confirm family relationships with Deborah by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Deborah: