As families migrated and spread apart, surname spellings changed. This project is therefore open to all variations of the Follis surname.

Y-chromosomes are inherited only by males from their fathers. Submissions are limited to males whose biological father's surname was Follis or a variant of the name. If you are a female with Follis or variant ancestors, please help this project by asking your brothers, uncles, or male cousins to submit DNA samples. These are the people who carry your family's y-chromosomes.