I have some information on John SWITZER (1805-1860) and his wife Elizabeth WOLF (1812-1901). Their daughter Sarah Elizabeth (1841-1924) married Martin Van Buren PAGE (b.1840- Epsom, NH; d.1926). They lived in the Dysart, Iowa area.
I don't have any other names of John's children nor siblings. Let me know if this of any help.