I'm been trying to sort these guys out.
Right now I have two sorted out:
Pvt Daniel Secord, III married to Elinor Archer. Children: Warner, Daniel, John Susannah, Sarah, Rachel, Elinor, Nancy Ann, and James.
Daniel Secord married to Mary Archer and Abigail Fowler. Children: Mary, Jeremiah, Moses and maybe Daniel, Jonathan, and Margaret.
There is also a Nancy LeConte Secord with a Mary born 1744 and Judith born 1760 in the mixture, but does not appear to be the wife of either of these Daniel Secords. And Mary born 1744 is probably the daughter of Daniel Secord and Mary Aracher.
I welcome input. It appears there is a lot of confusion on the Internet and not perfect early 18th century records for this prolific family.