JENSEN, JENSSEN, JENSON, JENSIN, JENSAN, JENNSON, JINSON, GENSON, YENSON, JEINSON, JEANSONNE, and any other reasonable spelling variations are welcome to join the project. Only males have Y-chromosomes, so only male JENSEN (or varient) can participate. If you are female, you can have a male JENSEN (or varient) 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 JENSEN (or varient) as a pedigree (excluding living persons).