No help for you really but sympathy to all those trying to find O'Broin/Byren/O'Brien/Bryan/Brien. The ones I'm after are from your neck of the woods. Found your messages looking for Ballymoney References.
Was wondering do you know anything about those terrace cottages on the crossroad in Ballymoney. One of them's a shop now. Lollypop cottage etc. They look like they were built to house workers of some sort originally, God knows when. My partners father was brought up there. Donal O'Brien born 1920.