Mary Langstaff born @ 1792, NJ Married William L. Smalley NJ

I am seeking information about Mary Langstaff born about 1792 in Piscataway, New Jersey - died 26 Oct 1874, Harris Corner, Middlesex, NJ

She is buried in Evergreen Cemetery, as well as husband, William L. Smalley

She married
William L. Smalleyb 1789 in NJ, died 15 Dec 1869, Bernards, Somerset, NJ in. They were married about 1808.
They had 11 or 12 children.

I read of Henry Langstaff, and a Mary in NJ, but they were born much earlier. I am unable to link any of them to our
Mary.

Any help is appreciated in linking our Mary Langstaff to her ancestors.We cannot find who are parents, siblings, etc.

Thank you!