I am a Ropp and my granfather was Gaylord Cleon Sr. I have grown up in Michigan since I was a year old. I don't know if this is the same man you are looking for as I knew him briefly when I was a teenager, when I was a baby it is to my understanding that my grandfather lived awhile in minnesota where I was born. My grandfather was a tool & die maker by trade, my father is Gaylord C. Ropp JR, my Uncles are Ron & Rick, which Ron has passed away, and I have a aunt Carol who were all Sr's children when he was married to my grandmother Isa. I will ask my mother on more info as she has kept track of almost all family. Hope this helps. Any ?'s please ask.