Try the free search tool at: https://familysearch.org/search
You can plug in names/date ranges/locations and search. The example below is Strain/birth KS/1850-1950. Came up with 10,528 results! Click on the link and see if you recognize any names of your ancestors.
https://familysearch.org/search/record/results#count=20&query=%2Bsurname%3Astrain~%20%2Bbirth_place%3AKS~%20%2Bbirth_year%3A1850-1950~