My great grandfather was Heinrich C. Stradtmann, born in Celle (then Kingdom of Hannover) in 1820. There are indications that his parents may have moved there at the conclusion of the Napoleonic Wars and "Germanized" some other surname to Stradtmann. DNA testing points to possible origins in the Netherlands (most likely), Denmark, or Moravia. I am interested in hearing from any Straatmanns who have undergone Y-DNA analysis for us to compare results.