SULLIVAN, SULLIVANT, SULIVAN, SULLEVAN, O'SULLIVAN, SULAVEN, SOLIVAN, SULIVEN, and any other reasonable spelling variations are welcome to join the project. Only males have Y-chromosomes, so only male SULLIVAN/etc. can participate. If you are female, you can have a male SULLIVAN/etc. 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 SULLIVAN/etc., in the form of a pedigree (excluding living persons).