A good place to start your research is by using the free search tool at: https://familysearch.org/search
You can plug in whatever information you have as to Locations: Timeframes; Name/ of spouse/parents etc.
An Example of such a search is below.
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Aleroy~%20%2Bsurname%3Ablackford~%20%2Bbirth_place%3Aus~%20%2Bbirth_year%3A1870-1903~