I've traced my ancestors back to 1831 thanks to the County Kerry marriage record detailed below, but can't seem to figure out how to go back further. Any suggestions? Thanks!
additional info - Walter Costello and Margaret (Mary) Tangney immigrated to NY and soon after settled in Boston in the early 1850s. They brought with them at least 4 Irish-born children: Michael, Honorah (Hannah), Patrick and Catherine. I've tracked down Walter Costello's immigration papers, but it only lists his birthplace as Co. Kerry, Ireland.
Name: Walter Costelloe Marriage: 11 February 1831 Marriage Place: Currow Roman Catholic Church, County Kerry, Ireland Spouse: Margaret Tangney