Murphy's born in Duagh County Kerry

I am looking for information on 3x Great Grandparents and their children. Family information passed done says that 4 of their children were born in Duagh see the list below.

Parents are John Murphy born about 1790 in possibly Limerick. Ellen O'Keefe born in County Kerry about 1800. The 4 children are Deborah Murphy born 4 July 1822, Ellen Murphy 15 June 1825, John Murphy born 1823 and Frank Murphy abt 1825. All of these children immigrated in the early 1850's to Palmyra, New York. I have no documentation other than passed down family trees from other family members dating back to 1950's which tells me they may have some family knowledge about the births of these children. According to the family tree's the family may have started in Abbeyfeale moved to Duagh then back to Abbeyfeale. This does seem  unusual for the time period that they would move. I am also very interested in finding the parents of John Murphy and Ellen O'Keefe however I have had no luck. If anyone would have info on this family or could point me in the right direction I would that would be great.

Thanks

Pat Haefner