This is a group study by the National Grigsby Family Society for the surname Grigsby and the variants such as Grigby, Grigbie, Greagsby, Greegsby, Grigdesby, Ghrigsby, and any other that may be identified. This organization includes members throughout the world and welcomes any male of such surname to join. The study begins with a baseline of the major family lines of descent from the person known as Immigrant John Grigsby (born 1624, died 1730) and expands with the following objectives: 1. Provide a baseline of data for the major Grigsby (or variant) family lines in the United States 2. Verify assumptions and conjectures for various lines of descent 3. Provide opportunities to connect independent lines of descent 4. Target the direction of future genealogical research 5. Provide possible connection to Immigrant John Grigsby's origin in England 6. Position the organization to connect with other lines throughout the world The study would prefer that members use the 111-marker test, but will accept tests of 12, 25, 37 or 67 markers.