Hello Tierneylass and Luimneach,
Thank you both for your speedy replies. In answer to your reply Tierneylass Cuan is not called Cuan any longer. I did see one site that mentioned its new name many moons ago but now cannot find it although I have tried and tried. It was still called Cuan in the early 1800s, but I have no idea when this changed. That is why I find it so hard to pinpoint a parish church for it.
In answer to your reply Luimneach I have tried Google in every way I can think of, but no luck. I am grateful to you both for you efforts to help me. I guess I will just have to keep trying.
Kindest regards,
Nora