To do this right, you must have the y-dna of all your ancestral lines

...and the autosomal, and for many, the mt-DNA also. The male line y-DNA is the genetic signature of a man's paternal line. It is only their father's father's father's father's father's father, etc. (and all of their sons' sons' sons); no other ancestors, and they should all have the same family name. The mt-DNA, less … Continue reading To do this right, you must have the y-dna of all your ancestral lines