My great-grandparents were Denis McDaid and (possibly) Biddy Doherty and they came from the 'Illies' in Buncrana. This is on my grandfather's marriage certificate. My grandfather, William McDaid, son of Denis, was a shoemaker in Derry in 1900, where he married my grandmother, Rose Kelly. Denis McDaid was deceased at this time. Is it possible that Denis McDaid was also a shoemaker in Buncrana? I would be grateful for any information about the family.