Shropshire Family History Is It Possible To Trace Irish Family History If You Don't Know Which Area Please?

Is it possible to trace Irish Family History if you don't know which area please? - shropshire family history

I am researching the Downes family in Newport, Shropshire consistently started around 1840 and married in Ireland in Ireland, which is of the family, Toole and Fahy. I have no idea how to start research in Germany. I know that many records were burned. Do I need a region of Ireland and where is the best place to start? are
the name of a type of track?