Re: Margaret Weatherwax, b. 1778 NY
There is a 2 Volume book entitled " The Palatine Families of New York 1710" by :Henry Z Jones jr.
Volume 2 contains the history of the Weatherwax family's arrival in NY Colony in 1710 as a part of this group; pgs 1094-1096 will give you info on all siblings of Jacob B:1743 (19 of them) and
his grandparents etc. It takes the family back to around 1625 in present day Germany.
Any good Genealogy library will probably have this standard work, If you cannot find it locally let me know via this forum and I will help you out. The 2 volume set is still in print from Picton Press (www.pictonpress.com) but costs slightly over $100.00.