A secondary surname project, founded 2006, to similar surname Gaughan; join the primary Gaughan project too! https://www.familytreedna.com/groups/gaughan If the genealogy for the name Cohagan is to be traced, it is imperative that DNA projects be advanced so that relationships can be established. Many name changes have occurred over time with emigration. Relatives have to be united by the DNA Project. Welcome to the Cohagan project, the first of it's kind in the World! Dr. Don Cohagan