Hi, I am an illegitimate child. I only recently was able to find some of my fathers family through DNA and some public records. My father is deceased but I have 3 (born in marriage) half sisters, one of whom is willing to do a DNA Test. My mother is not willing to do DNA testing nor my half sister I share her with. My father's brother is willing though. My questions, and I know very little about DNA, is it at all possible to use tests from my half sister who I share a father with, and my Uncle, his brother, to determine which DNA came from him, and what might have come from my mother. Otherwise, I'm not sure how much use I can be to this project. I have Cousin Matches through her line, one of whom I saw on here, but they are distant and probably not much use for closer relationship proof. As far as family line goes, on my mother's side, I am the last in my family line to carry the Hartzell name. I was given her maiden name at birth, as was the hospital's custom back then in cases where paternity was unknown or murky. I'm willing to help, I just am uncertain how much help I can be.