The story of Jacob's move to American was recorded in the history of Lancaster Co, PA: "Jacob Wissler, the first member of this branch of the Wissler family in America, emigrated from Switzerland and sailed with his wife, Magdalena, from Rotterdam for Philadelphia about 1720. One the voyage, together with other able-bodied men on the vessel, he was impressed into the naval service by a man-of-war. His wife continued the journey to Philadelphia, where he joined her on the expiration of his term of service. She was employed by a farmer of Germantown, and he also took service with a farmer of that locality, for a time, after which they moved up the county and settled on Brandywine Creek, in Chester county, where they passed the remainder of their lives."
1750 Conestoga Twp, Lancaster Co, PA. He and Rudolph were the only Wisslers having property in this twp according to the tax list. Henry was in Donegal and Abraham was in Cocalico.
1765 Philadelphia, PA. Jacob arrived in America, probably from a trip back home.