I'm just getting started here. What I do know is that my great-grandfather was Matthew McCusker, born in Ireland, perhaps the North. He started out small but went on to own many pubs and perhaps a brewery in Northern Ireland. He had a number of children, one on whom was my Grandfather, Edward born 1900, died 1977. Edward took over some of the pubs and moved between Scotland and Ireland, at one time owning a pub in Dumfries. He married Jean Ellis.
That is about as much as I have for now. If things rings a bell for anyone then it would be great to hear a response, if not then, good luck to all of us in here.