The Horton Surname Project coordinates and supports efforts to determine connections among various Horton lines globally. While most participant lines have resided in the U.S. for generations, the U.K. and Australia are represented as well. We focus on YDNA testing because of the Horton surname’s Anglo-Saxon origins and traditions in which one’s surname was taken from one’s father’s (or paternal) line. We also compare results from FTDNA projects of surnames of commonly found spelling variations such as Wharton/Whorten, Haughton/Houghton, and Orton. Once test results are received, we analyze those results to place the participant in an internal group which matches genetic markers of other participants. These groups are labeled by number and (when possible) the name of its earliest known common ancestor. The labels are fluid and subject to change to reflect new genetic linkages (or not). This explains, for example, Group 7’s awkward title, “Formerly Barnabas Horton now Abraham and Richard Horton of PA.” Participants are highly encouraged to submit their own researched family trees to help reveal patterns of common ancestors or geographic overlap. To maintain privacy, we suggest a family tree identifying the participant’s paternal grandparents along with vital dates and locations (birth, marriage, death), while keeping younger generations private. Finally, while the level of YDNA testing ( 25, 37, 67, or 111 markers) is up to the participant, the admins. can guide you.