Welcome to Ireland Reaching Out!
Kelly is a very common surname in East Galway so it will be very difficult to identify possible relatives living in the Ahascragh area currently without more information on the family. ( As an aside Catherine Kelly's maiden name was also Kelly).
Do you have any other information on your family?
Parish priests are very overstretched so they find it difficult to assist with requests to find relatives.
Have you considered autosomal DNA testing?