Israel Pemberton married Sarah Kirkbride of Bucks County. [1] [2]
[1] William W. H. Davis, with Warren S. Ely and John W. Jordan, ed., History of Bucks County Pennsylvania, 2nd ed., Vol. III (1905), 136, [GoogleBooks], [HathiTrust].
[2] John W. Jordan, Colonial Families of Philadelphia, Vol. 1 (New York: Lewis Publishing Company, 1911), 551, [HathiTrust], [InternetArchive].