This window is an interface to the excellent CDS X-Match service provided by the Centre de Données astronomiques de Strasbourg (CDS).
The service is very fast, and in most cases it is the best way to match a local table against a large external table hosted by a service.
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In order to answer this question it is best if you upload your raw DNA data to Gedmatch.com, as this is the best way currently available to assess if there is a match on the X-chromosome.
Instructions on how to upload your results can be found here.