Alfred O'Brien (1802 - 1869)

Summary of DNA findings so far. https://donaldancestry.blogspot.com/2020/05/more-dna-other-evidence-on-ancestry-of.html

Autosomal DNA (atDNA) of descendants (e.g. T945852) of Alfred have matches with each other & with descendants of his reported brother Peter O’Brien III. See sibs & parents at Find A Grave # 84421922. yDNA from a descendant of brother Wilford O’Brien is Haplogroup R1b, SNP-marker phylogenetic tree includes L21+ (Atlantic Celt) -> L226+ (Dalcassian = Irish Type III) -> DC782+ (County Clare group peel-off from Brien Kings of Munster) -> Terminal SNP DC297+ (focal to matches of yDNA descendants of Wilford O’Brien). https://www.familytreedna.com/public/obrien?iframe=ycolorized yDNA suggests ancestry in southwest Ireland. O’Brien atDNA has matches in Londonderry, esp. same persons matching both a descendant of Alfred & a descendant of Peter III. O’Brien migration routes may have included County Clare vicinity, Londonderry, Fauquier Virginia, Mason Co. Kentucky, Pike/Ross Ohio, Fulton Illinois, with kin in the Carolinas.