Although the McArdle's are descendants of the McMahon's and Clan Colla it was felt that to encourage more testers that a more focused group would help with recruiting and help build the SNP tree now available with the advent of Big Y testing.  

Two long term projects are the McArdle Worldwide Database and the U.S.Census 1790-1950. The 1950 census will become available to the general public this coming 1st of April of 2022. Every name in the census  will be linked to the Database.