I searched with only one possible lead for you in bold below, mostly there are too recent for you.
Some Belfast Roche
1852 from street directories
http://www.lennonwylie.co.uk one year example only
Roche, Thomas, posting establishment, 16 Fountain Street
Roche, Patrick, grocer and provision store, 48 Cromac Street
1860
Griffiths valuation for Shankill Parish Co Antrim
Roche Darius William's Lane
Roche Frances A. Joy Street
Roche Patrick Green Castle
Roche Patrick J. Tate's Ave
Roche William Old Lodge Road
Roche William John Great George's Street
Roche William John Donegall St. Pl.
Clifton st cemetery see
http://www.cliftonstreetcemetery.comLOT 41-42-43 ANDREWS
summarized,from. plus extra detail from the Registry
William John Roche b~1826 Belfast-d 1920 [ april 20 Belvedere Sans Souci aged 95m] Sarah Gibson Roche b~1826 Belfast d1906 at 1 Fortwilliam terrace
children ie only those buried with them
Alice Maria b Belfast Aged 7 years d 1861 at 36 st georgesSt
Samuel Gilston 6 weeks aged b 2 Sandyscape Belfast both parents b in belfast
William Howard 17 years
Julia Florence 20 years
from
http://www.ancestryireland.combirths with fathers first names
THOMAS ROCHE 1830 THOMAS AntrimTHOMAS ROCHE 1838 MAURICE Antrim
THOMAS ROCHE 1846 PATRICK Antrim
marriages with fathers first name
ROCHE SUSAN 1877 THOMAS Down
ROCHE MARY ANNE 1887 THOMAS Down
emerald ancestors
1878 Thomas ROCHE m Bridget XXXXXX Londonderry
1902 John Thomas XXXXxx m Elizabeth Georgina MITCHELL Belfast Antrim
BUT neither has a match under spouse