Maureen, this may be a long shot, but I have O'Connor relatives from Castlegregory, some of whom are in NZ.
My address is 104 Harris Crescent, Papanui, Christchurch, 8005, NZ. I have some info that may be of interest to you, although at present it is too vague to put on the web. I was in Castlegregory recently trying to get a steer on some of it. Get in touch if you are interested.