I have a William B. Williams b. 11 sep 1780 in another Williams line. He d. 10 Mar 1875 N. Pembroke, NY, m. Mary (possibly Williams) b. 1 Jun 1783 Rensselaer, NY. I don't think he is the one you want. Their daughter OLIVER Huldah m. an Elonzo Williams. still working on those Williams but not connected to the ones ot of Philadelphia. sorry