I have a John
Dunham as the father of my great grandmother, Margaret Pearl Dunham-Black. Margaret married Harry
Myron Black of Connellsville, PA. but later moved to
Ohio. My grandmother,
Olive Pearl Black, was born within that union. She also had two or three older brothers and a sister. Her mother, Margaret, died at the age of 22 in
Vermillion,
Ohio (I have her death certificate). The father later remarried. So, I am hoping that you are talking about John Sr. which would add another branch to this nut tree of mine. I will check it out and if any of this comes to anything I'll get back with you. Then you can add another line in there.