The Mumford Surname Project currently (6/2024) has just over 30 members. The ancient haplogroups of these members, as determined from low-level Y-DNA testing (Y-37 and Y-111), indicate that the members have their origins in at least 4 very distinct groups, with the E, I, Q, and R early haplogroups all represented. The largest group is under the R-M269 ancient haplogroup, with the next largest under Q-M242. Big Y testing is strongly encouraged for Project members, as the results of this test have the potential to provide information leading to exact connections between testers. Big Y testing of multiple members with known relationships will lead to creation of a detailed haplotree of their genetic connections, which can then be used to show testers of unknown relationships, but similar Big Y results, exactly where they fit in the haplotree, and therefore where they fit in the related-testers' physical family tree. Unfortunately, very few of the current members have tested at the Big Y level. A notable exception is two men (a Mumford and a Momphard) whose Big Y tests have revealed their shared haplogroup, I-Y78878, which happens to have a connection to two other Surname Projects. I-Y78878 is a "sibling" of two other haplogroups (I-BY34474 and I-FT186158, which are associated with the Petty and Patty surnames, respectively), with all three being "child" haplogroups of I-Y24458. Studies of the Petty and Patty families suggest that the three child haplogroups likely branched off the parent haplogroup sometime around the 17th century, and continuing studies are aimed at following this family's shared ancestors back to their early (English) origins. It is expected that similar findings will be uncovered with additional Big Y testing and/or upgrading within the R-M269 and Q-M242 groups.