« Reply #24 on: Sunday 31 March 19 14:20 BST (UK) »
My advice would be to test with AncestryDNA then upload your results to other sites such as MyHeritage. What you are hoping to achieve should be possible. I have been on the hunt for the parents of my mysterious great grandfather for many years and am now getting close to pinning them down thanks to new matches that are regularly rolling in on Ancestry. I now have a fairly good idea of which family one of his parents belonged to, but still have more work to do to identify the correct individuals. You may be lucky enough to have the information drop out easily from closer matches or you may need to put in considerable effort to do the analysis. Either way, you have nothing to lose and potentially much to gain by taking the test.
Unless you are worried about other potential surprises that might pop up and make you question your tree.
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