All ARMSTRONG male FTDNA testees are welcome to join the project, plus transfers from Sorenson-based labs. Only males have Y-chromosomes, so only male ARMSTRONGs can participate. Those via other surnames who closely match Armstrong Y-DNA, either as a result of an adoption or an NPE, are also welcome. If you are female, ask a male ARMSTRONG relative to submit a sample for your line.To participate meaningfully, testees will need to share their direct male line ancestry back to their earliest known ARMSTRONG, either in the form of a pedigree chart, or preferably, family group sheets. Please exclude living people. Armstrong-born ladies, please note: there is a related mtDNA study in which you can participate if you wish. You can join that study by ordering an mtDNA kit through this project. We don't accept non-Armstrong Family Finder testees. FTDNA are unable to accept transfers from other labs other that are not Sorenson-based.