Hello, my grandfather was Dr. James Duncan Campbell. He was born in Fingal, Ontario in 1867. His father was Malcolm Campbell and his mother was Susan Jane Cameron. He went to Univ. of Michigan for his pre-med and to John Hopkins University for his Medical Degree. He settled in Hopkins, Michigan where he was a doctor and had 3 daughters Margaret, Barbara, Charlotte and 1 son John Malcolm Campbell. His son John Malcolm Campbell is my father. I'd like to learn more about his siblings. Sounds like your great grandfather and my grandfather were brothers.

Beth Campbell