I was working on John Switzer ca 1807 Pennsylvania died 23-NOV-1869 Waterloo, Blackhawk County, Iowa. The person who gave me the names said his father was John Stevens Frederick Schweitzer. John Switzer m Margaret Davies. They had 10 children from 1836-1857. I have been able to find marriages and deaths for 4 of the descendants.
Their son William D. Switzer m Lucy Robbins Messer 1881 Spokane County, Washington. My 3rd great Uncle George Switzer ended up in the same area for a while. George's wife died and is buried there. George ended up going back to Ontario.