This is the story of how I helped a Jewish adoptee find his birth family using DNA testing.
First, here is a simplified explanation of the technique that an adoptee uses to find his birth parents using DNA:
- Do an autosomal test at each of the main companies. Once the results are in …
- Look through the family trees of 2nd, 3rd, and 4th cousin DNA matches for a common ancestral couple or two.
- Build private, unsearchable family trees down from each common couple to find someone in the right place at the right time.
- Get other people on those lines to test when their results will narrow it down some more.
- Males can also do a Y DNA test which might give them a surname if there are any close matches.
Obviously the more you know about the birth parents the easier this is. For more details on this technique see http://dnaadoption.com/index.php?page=methodology-for-autosomal-results or sign up for a class there.
Sadly these DNA search methods do not work well for adoptees from endogamous populations, such as Ashkenazi Jews (AJ) because everyone in that group shares as much DNA with each other as a 4th or 5th cousin. Even worse, most Jewish family trees stop at the grandparents or great grandparents because they do not continue across the ocean. Another problem is that even second cousins can have different Americanizations of their original surnames and let’s not forget that surnames are very recent in this population, about 1815 for most.
That is why there are so very few jewish adoptee successes, so I am celebrating this one with a blog post.
The DNA Search Story
I got an inquiry from, let’s call him Roger Stein, an adoptee curious about his birth parents who matched a cousin of mine at GEDmatch. GEDmatch is a site where you can compare tests done at different companies. His story follows, with all the names changed for privacy. If you do not want the DNA details just skip to the section titled “Contact.”