Re: Johanna Keohane Bantry Ireland
This may not help Bill, but there are baptism reords for a Johanna Keohane in Caheragh parish, just east and south of Bantry, as follows:
25 Sep 1836 Con and Ellen [Carthy];
17 Dec 1837 Bat and Nory [Crimeen];
5 Oct 1839 Jerry and Jo [Clancy]; and
27 Jun 1852 Jerry and Johanna [Minihane].
Sometimes it helps if you can determine where the parents were married or the first child baptised. It was common to be married in the bride's parish church and usually to have the first child baptised in the same church.
There were plenty of Keohanes in the Bantry area.