FITZMORRIS and PEARSE

My 2-great grandfather, Garrett Edward FITZMORRIS, was born 1846-47, possibly in Listowel, Co. Kerry. His parents were Edward FITZMORRIS (b. abt. 1795; d. before 1852) and Margret ____. Margret was b. 7 Aug 1797 in Abbeyfeale, Co. Limerick. Garrett was the youngest of four known children of Edward & Margret; they and their mother appear to have all emigrated to New York, USA, in 1852, after the death of father Edward. Garrett married (about 1865-1869, in Erie or Cattaraugus Co., New York) Margaret PEARSE, who was b. 1846-49, possibly in Daugh, Co. Kerry; parents Maurice PEARSE and Mary COLLINS. However, there is also a possible baptism for Margaret PEARSE/PIERCE in records of St. Mary's Catholic Church, Abbeyfeale, Co. Limerick on 29 March 1840. They also have a John PEARSE bapt. 16 June 1843, same parents. I have visited Limerick and Kerry, but found no further information. I would like to correspond with anyone researching these names. Many thanks!