Descendants of Jan Brouwer can be identified by a unique allele value of 7 at the DYS565 marker. Richard Brewer has added an article explaining this finding to the “Brewer Descendants of Johannes (Jan) Brouwer” website, titled, “Jan Brouwer descendants carry a unique DYS565 Allele Value.” Determining whether or not you as a descendant (or believed to be descendant) of Jan Brouwer have this marker, requires ordering the YDNA 67 marker test when signing up with the Brewer DNA Project. Those who have already been tested at 37 markers are urged to upgrade to the 67 marker test.
Sunday, May 13, 2012
Unique Jan Brouwer Genetic Marker Found
The following fist appeared online on May 10, 2011 on the original Brouwer Genealogy website.
“Unique Jan Brouwer Genetic Marker Found: Results from extending the Y-DNA test to 67 markers in some members of the Jan Brouwer descendants has revealed that we have a marker value that is so rare that it is specific to identifying our own family branch within the larger haplogroup I2b1c. A very rare DYS565 Allele value of 7 repeats has been found in the Jan Brouwer descendants. This value defines a unique family branch within the major haplogroup I2b1c; a mutation that likely occurred in an ancestor living in the Belgium / Netherlands / Germany region 400 to 700 years before the present. If two people share the allele value on this marker and are similar enough across the rest of the markers to share a common ancestor in a genealogical time frame, then they belong to the same family branch and everyone without the rare allele does not.” - Richard Brewer.