Many thanks to everyone for the great help. I cannot tell you how much time has been wasted trying to work these out. Knockea works well for my gggrandfather, Laurence Moloney, as his sisters are reported to have come from "Balingard". Murroe was the "Native Place" of my gggrandmother, Sarah Kirby, and Kirby appears to be a common name in Murroe. The location of Caherconlish, the birthplace of their daughter, my ggrandmother, fits in well.
Thanks again
Brian