https://www.23andme.com has $99 genetic genealogy testing. One of our male Blume primary lines has already tested - This may be an opportunity to test and find links where the historical record cannot be found. We already have identified 1200+ relatives we didn't know existed, some going back to ancestors 200+ years ago. Highly recommend 23andme and ask if anyone here on Blume interests or Lehmann interests (see surnames list) has tested and would like to compare notes. thank you!