Hi, not Leila but her Cornelius McCarthy, a cousin to my McCarthy line, married Mary Collins 1854. Children: Ellen (1854), Andrew (1856), Jane (1858), Mary (1860), Dan (1862?), Margaret (1863), Cornelius (1866). This is a Sowney line from Upper Lissane, outside of Drimoleague.
It looks like your family lived in Maulcorragh. Their first born son was named Daniel. It was traditional to name the first born son after the paternal grandfather and there was a Daniel McCarthy in Maulcorragh at the time of Griffiths. There is a Daniel McCarthy in Maulcorragh in the Kilmeen parish Tithe Applotment from 1829. Have you tried following up on that?