The Great Migration Begins includes a biosketch of William Knopp which states that William was a carpenter and that he and his wife and children immigrated to Watertown, Massachusetts in 1630. [1]
Clifford Stott identifies the English origin of William Knopp and his wife Mary Tue and provides the baptism and marriage records of William and Mary and the baptism records of their children. [2]
[1] Robert Charles Anderson, The Great Migration Begins: Immigrants to New England, 1620-1633 (Boston, Massachusetts: New England Historic Genealogical Society, 1995), 1143, "William Knopp", [AmericanAncestors].
[2] Clifford L. Stott, "English Origins of William and Elizabeth (Tue) Knopp of Watertown, Massachusetts," New England Historical and Genealogical Society Register, 147 (1993), 315-328, at 315, [AmericanAncestors].