In 1881 your family are living at 7 Black Bull Close.
In the same census at 9 Black Bull Close, you have the Watson family.
Robert Watson and Susan b Port Glasgow (not sure this is correct).
There is a boarder, Sarah McCrorey b Port Glasgow too.

Marriage 1870 Robert Watson and Susanna McRory
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1870/11389/8181636.pdfFather is Michael and residence Grogan.
There is a baptism
28th February, Drumaul parish (transcribed as Merory) Susan and Margt Night.
Also
19th September 1852
Sarah McRory with parents Michael and Margaret McNight.
You can access these on catholic NLI site - Drumaul parish as earlier posts.
Scottish records might show more to see if all this relates to your family.