Hi everyone, I might be able to help. I am related to the McNerlins through a marriage, way back.... There is a Daniel McNerlin in my family tree who married Margaret Barr. When she passed away he married Elizabeth Cox. Daniel and Margaret had a son, Edward Ralph McNerlin, who married Cissy Lewis and they had a son, Edward Campbell McNerlin. I could give you more names and information if you think these are your relations. The family lived in County Down, though, not Belfast, near Seaforde.