BYRD, BIRD, BURD, and any other reasonable spelling variations are welcome to join the project. Only males have Y-chromosomes, so only male BYRD/BIRD (or variant) can participate for the purpose of surname research. If you are female, you can have a male BYRD/BIRD (or variant) relative submit a sample for your line. To participate meaningfully, testees will need to share their direct male line ancestry back to the earliest known BYRD/BIRD (or variant), as a pedigree (excluding living persons).