My friend Louis Kessler has taken four separate DNA tests and in a blog post, he discusses the results. Louis has a somewhat unique genealogical history, he is 100% Ashkenazi Jewish based on years of genealogical research in an area within a couple of hundred mile radius that is restricted to northeastern Romania and southwestern Ukraine. With this unique perspective, Louis has carefully documented and compared the results from his four DNA tests. There are also links to earlier blog posts on the same subject. My posts today give you a broad perspective on the incorporation of DNA testing in genealogical research.