Hi Michelle heres something on your quest
Another source might be street directories, so start with http://www.lennonwylie.co.uk
Mary Lennons website is free but I urge you to donate something
McQuillan, Edward, 1 Carrick Hill
McQuillan, E., spirit dealer, 18 Gamble Street
McQuillan, E., spirit dealer, 52 & 54 Gamble Street
In 1861 there were
McQuillan, John, boot and shoe maker, 7 Peter's Hill.
McQuillan, Charles, shoe maker, Falls Road
McQuillan, Edward, shoe maker, 24 Pound Street
McQuillan, Edward, Shoe Maker, 69 Barrack Street.
McQuillan, John, Boot and Shoe Maker, 9 Peter's Hill.
And others, there are more indexed directories on her website