Terry undertook a large DNA analysis project on the paternal side of his family. The purpose of this analysis was to try and prove/disprove the relationships between different family lines. Over 25 family members participated by testing on Ancestry and FamilyTreeDNA. This presentation is a summary of the approach, issues, methods and results from that study. The lessons learned, both good and bad, are valuable for any Jewish person wishing to use DNA to research or solve their genealogical puzzles.