Help To Find Great Great Grandparents From Sunhill Area

The Archive Office has received this email from Australia. If anyone can help with any information we would be delighted to forward it on. I was wondering how I go about locating an area where my Great Great Grandparents lived when they got married and had my Great Grandfather in 1823 -1830 and after. They lived in Sunhill, Killorglin. Is there any way of knowing approximately where they may have lived through searching  your archive records please? An address, a street, an area???

Their names were Timothy and Mary MULLANE (son) Daniel MULLANE