This surname project is primarily Y-DNA based and welcomes those who have autosomal DNA matches to these surnames, as well. The co-administrators Gary K. Weeter and John M. Weeter, M.D. share the earliest known common paternal ancestor, Peter Weeter. Peter Witter/Weeter (about 1760-1843) and Christopher “Stophel” Witter (1758-1825) knew each other in lower Path Velley, Metal Township, Franklin County, Pennsylvania. They are listed individually in early tax and other records as Witter. Later Peter changed the spelling of his surname to Weeter, as recorded in his probate records. Big-Y and Y-111 test results give the closest match to Peter’s patrilinear descendent, John M. Weeter, and Christopher’s direct patrilinear descendent, Robert Witter. John M. Weeter, Robert Witter, and Irvin Eugene Widders are the only current individuals confirmed in the R-FTE7245 haplogroup, which is a subclade of the R-M198 haplogroup. Other Y-DNA matches with John and Gary are in the R-M512 haplogroup, which is a closely related variant of R-M198, and have not yet been tested in the Big-Y. It is not yet known whether Peter and Christopher were cousins or descendants of an earlier common ancestor. We seek to identify the earliest common ancestor and learn from where he emigrated. Research in the early southeast Pennsylvania counties and Maryland has found other similar surnames. The specific relationships of these with Witter, Weeter, Weter, Weiter, Weider and Widders surnames is one of the goals of this group project. It is known that some of these were German-speaking and associated with the Anabaptist, Mennonite, and German Reform religions. Peter and Christopher were probably 1st or 2nd generation immigrants from Germanic Europe. This may include Switzerland, where Peter’s wife, Catherine Over’s family descended. [We have learned that another Witter surname family grouping settled in upper New York and Connecticut of Colonial America, and they may have emigrated from the British Isles.] One genealogist suggested that an earlier spelling of Weeter or Witter surname could be Wyder in Germanic Europe.