There is a book "Emigrants, Refugees and Prisoners, Vol I" by Richard Warren Davis, published in 1995, which gives family histories for a number of Anabaptist families who came to America in the 1700's.He has a discussion of the Wissler/Wyssler/Wisler families. He has Jacob Wisler (1700-1752) as the son of Christian Wissler, b. 16 Feb 1666, Langnau, Switzerland, grandson of Jacob Wissler, b. 15 Mar 1622, Sumiswald, Switzerland, and great grandson of Hans Wissler, b. 1 Feb 1596, Sumiswald, Switzerland, and great great grandson of Ulrich Wissler, b. ca 1570. Davis has the Jacob Wisler, b. 25 Jul 1738, who married Catherine Gruber, from another Wissler line, namely Benedict (b. ca 1707), Heinrich (b. 25 Jan 1657), Marx (b. 1 Aug 1630), and Marx (b. 23 Jan 1603).