I am making comparisons between myself (Kit #98898) and each other individual in the Gysi Project. While most men in this project are having the Y-DNA37 markers test, I and a couple others have taken the Y-DNA67 or 111 marker tests.  Comparisons between individuals can be made only for the markers both individuals have tested. The table names an immigrant or most distant ancestor, the number of markers tested, and the genetic distance (the number of non-matching alleles). Mutation rates differ for each of the alleles. Using the formulas developed by Family Tree DNA we can calculate the probability of having a common ancestor within a given number of generations. I have reported these percentages in the table below. Based on Previous Research Family Tree DNA Info Probability of MRCA within X Generations Kit # Ancestor Markers Tested Genetic Distance X=6 X=8 X=10 X=12 X=14 X=16 X=18 X=20 Group 1. Swiss R-L48: Hölstein Descendants of Johann Conradt Giese (1718-1802) 99030 Johann Conradt Giese, Sr. 37 0 36% 74% 90% 96% 98% 99% 100% 100% 100828 Johann Conradt Giese, Sr. 37 1 27% 63% 81% 91% 96% 98% 99% 100% 100988 Conradt's son Johannes Jacob Giese 37 2 19% 50% 71% 84% 91% 95% 98% 99% Descendants of Ulrich Gysin (b. ~1670) 162669 Heinrich (Henry) Giesy (1760-~1845) - MD 111 1 36% 74% 89% 96% 98% 99% 100% 100% 162670 Thomas Geesey (1834-1909) - MD 111 3 12% 35% 56% 72% 83% 90% 94% 97% 373453 Johann (Hans) Ulrich Gysie (1754-1834) - OH 37 2 27% 63% 82% 91% 96% 98% 99% 100% Descendants of a Casey lineage in North Carolina and Kentucky 331320 Casey 37 0 36% 74% 90% 96% 98% 99% 100% 100% 180007 John Casey (1784 - 18??) 67 1 27% 62% 81% 91% 96% 98% 99% 100% B706184 Robert Casey (b. ~1770) 111 2 39% 79% 94% 98% 99% 100% 100% 100% Descendant of a Stevenson lineage in Pennsylvania 331320 James Stevenson (1802-1870) 67 5 33% 61% 79% 89% 95% 98% 99% 99% Group 2. Swiss R-P312: Oltingen 62906 Jacob Arnold Gysin (1876-1953) 111 52 - - - - - - - - Differences compared with Jacob Arnold Gysin's descendant 104317 Johann Caspar Giesse 67 2 94% 98% 99% 100% 100% 100% 100% 100% 251328 Andreas Giesy (1791-1860) 37 3 75% 87% 94% 97% 99% 99% 100% 100% Group 3. Swiss/French R-M198 lineage 363974 Jacob Geise (b 1777) - Berks Co, PA 67 49 - - - - - - - - Differences compared with Jacob Giese's descendant 214440 Jacob Gysi (1681-1749) - PA 37 26 0% 0% <1% 1% 2% 5% 9% 15% Group 4. Pennsylvania J-M172 Group 255230 Conrad Keesey (b. abt 1850), Lancaster Co., PA 37 37 - - - - - - - - Differences compared with Conrad Keesey's descendant 930556 Peter Geesey (1828-1892), York Co., PA 111 12 6% 15% 29% 43% 58% 70% 79% 86% Group 5. Pennsylvania R-M173 Group 191879 John A. Geesey (1797-1879) born in Lancaster Co., PA, died in Allamakee Co., IA 37 19 - - - - - - - - Differences compared with John A. Geesey's descendant 190180 William Keesey (1810-1893), Schuylkill Co., PA 37 7 0.1% 1.4% 4.4% 9.6% 17% 27% 38% 49% 196195 William Keesey (1810-1893), Schuylkill Co., PA 37 7 0.1% 1.4% 4.4% 9.6% 17% 27% 38% 49%