Hans Wittwer is the immigrant ancestor of the Witwer family in Lancaster County, Pennsylvania. He was born about 1671, probably to Hans Wittwer Sr. and his wife, Mary, who were Mennonite refugees at Wagebach, Pfalz in December of that year.
He died before March 8, 1741, when an inventory of his estate was made in Lancaster County.
We know that he was married twice because his will names a stepson, Hans Gerber. His first wife, unknown, was probably the mother of his two known children, Michael and Mary. His second wife may have been the widow of Hans Gerber Sr. who arrived in Philadelphia on the Charming Nancy in 1737. Arriving on that same ship was Wendel Holl, who later married Witwer's daughter Mary.
Hans had been in Lancaster County much longer, arriving by 1718, most likely with the second wave of Mennonite immigrants in August 1717.
He pursued various tracts of land from the family of William Penn and died owning 632 acres north of present day New Holland. The Paxtang Road cut through the northeast corner and a stream dubbed Witwer Run (later, Martin's Run) ran northwesterly from "The Big Spring" just to the south. It was an ideal location for a farmer and miller.