You didn't mention:  Did the surname you were searching come from a genealogical trail with no father/son connections between that ancestor and you.  IOW you got your X from your mom as did all the putative intermediaries.  So if it is significant, not only is the trail correct but because that person got his/her surname from his/her father, the terminal person would be that 1st person in the trail with that surname. John L David G wrote To: genealogy-dna@rootsweb.com Message-ID: <CAAwK9jBYR6nviNcmC5JcDF90Bb-Fz41Zo2jBCqwbrhC2g8X5oQ@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 I have been playing with the revised version of the Gedmatch Search all Gedcoms function. I looked up one of my family surnames that were all born in the same country. Then picked out those whose details sounded familiar as well as those surnames who came from the same or adjoining counties as mine. I then compared their results in the 3D Chromosome Browser. The results were not too dramatic,some of the matches were in the 5cms and 6cms range. One result though on the x-chromosome I thought might be significant, one block over 8cms. and another block over five, both with the same person. My query is would the x-chromosome really be significant and also due to the similar surname and geographical location would the other five to six cms. matches also have some relevance. David