My name is Molly McDonnell, and I found your post when I googled my greatx3 grandfather, Peter Duncan, on my mother's side of Sheffield, Illinois!!! I have my family tree ("McDonnell Family Tree") available for public view on Ancestry.com.
I am building my family tree, so I am knee-deep in research. I was born and raised in Davenport, Iowa...the family didn't go too far all these years!!! Let's connect.