The Petty Surname Y-DNA Project at FTDNA has identified, through meticulous conventional genealogy, the immigrant ancestor of one of its lines as Hubert Petty, d. 1687 in Lancaster Co., colonial Virginia (Petty-7). The professional genealogist who made this discovery, determining him to be his 7th great grandfather, was the late James Winter Petty (Petty-3070, d. 2020), who took the Big Y test in 2015 and was given the haplogroup I-BY34474. Since that time, over two dozen direct descendants of Hubert Petty have taken the Big Y test and joined the Petty Project, resulting in the discovery of three levels of subclades below BY34474, and 11 unique terminal SNPs. I-BY34474 is now considered the Hubert Petty Clan haplogroup. James Winter Petty's terminal SNP is now I-Z39481, which sits at the second level below BY34474, and has no equivalent SNPs or private variants. The haplogroup series from Hubert Petty to James Winter Petty is I-BY34474 --> FT404340 --> Z38481. Though not a long haplogroup series, it does span a period of over two centuries (based on the estimated year of the haplogroups' formation). Also, the confidence level for the relationships in this series is extremely high as the connections are Y-SNP confirmed. Another descendant of Hubert Petty in the Petty Project has him as his 9th great grandfather. His haplotree follows the series I-BY34474 --> BY120617 --> FT122807 --> FT348032; he has one equivalent haplogroup and one private variant.
