Brady Surname Project

Brady yDNA Project
  • 105 members

About us

(Overview)  The Brady Project is based upon comparison of yDNA tests among male Bradys, males with related or similar names, and males with any name who are related through yDNA testing to other members of the Brady project.  Females participating in the project should submit a yDNA test of a male family relative (father, uncle, brother, or male cousin) with their family name.  Currently project subgroups are derived from measures of genetic distance (GD) between the members of the project.  Results of mitochondrial DNA and autosomal tests may be included if the member desires, but they are not part of the studied results.  (20 July 2016)

Background. Most persons with the Brady name trace their ancestry to Ireland.  There is really only one distinct Brady group, and the origin is placed in the Kingdom of Breifne, close to the O'Raghalllaigh (O"Reilly) sept.  The meaning and language of the name's origin is unknown.  MacBradaigh allegedly had Chieftains when first mentioned in the Annals [1]  but were more associated with several bishops and the eranaghs (church laity) of the Kilmore Diocese in the area of East Breifne which became County Cavan.  With time the name spread to local counties as well as distant ones and other countries and continents.  It is currently the 54th most commonly occurring name in Ireland.   As with all Irish septs the descendants doing yDNA genetic testing do not all match each other.  The usual reasons they do not, such as adoption, fosterage, remarriages, or marriages where the husband takes the wife's name, etc, might apply.  There were also the upheavals of rebellion, famine, migration, emigration and religious preference which might prompt one to change a last name.  For the most recent centuries adoption and/or a non paternal event remain the primary reasons for a difference in last names.   In the FTDNA Brady Surname Project about 40-50% of those with yDNA tests named Brady match within the acceptable yDNA limits of genetic distance (GD).  The Y Haplogroup is R1b-L21, and subclades Z253+, L1066+.  This group is old enough to have some with SNPs [2] that vary, so hopefully other subgroups can be identified by SNPs to compensate for the lack of genealogical documentation.   Non-matching Bradys are also primarily L21, some matching local septs or County Cavan Plantation settlers.  (Footnotes. [1] Annals of the Four Masters, covering Irish history to  AD 1616, English translation. [2] SNP,  pronounced "snip" is an abbreviation for Single-nucleotide polymorphism,  a variation at a specific position in the genome found within a population. ) 7 Aug. 2016.

(Goals)  The Brady Project is focused on the family name Brady, variations of the name, and on families related through yDNA matches. Presently we are somewhat limited by the size of our membership data base, and we hope that if at all possible each group participant will submit some detail about their known direct male line and place of origin.  The project administrators are also in possession of some Brady yDNA information from previous testing sources no longer available. Obviously we are unable to present it to the Brady Project or the public outside of statistical summaries and inferred conclusions.  With a significant increase in project participation, however, we anticipate that more genealogically useful project subgrouping will be made possible, particularly among the present "unmatched" Bradys. (7 Aug 2016)