looked at records, but no luck on parents of Patrick
MA marriage records show the marriage of Anna Kinney to Thomas Hopkins, 20 Aug 1873. That recirds shows her b 1853, Athol.
1860 census of Cambridge MA
Patrick Kenney, 28, b IRR, carpenter
Margaret, 30, b IR
Ann, 6, b MA
John, 4, b MA
Mary, 1, b MA
neighbors, Patrick Calihan, 35, b IR; Richard Powers, 50(56?), b IR. Sometimes neighbors can shed light on maiden name of a spouse.
MA marriages on Family Serach show a Patrick Kenney md a Margaret Joyce(b 1825), 26 Oct 1859, Boston.
A Patrick McKenna md a Margaret McCrossen(b 1830), 8 Jul 1852, Cambridge.
1870 censu of Hampden MA
Patrick Kenney, 39
1900 census of Hampden MA
Thomas Hopkins, 49
Anna, 47, b Jul 1852, MA
David J, 8
Not sure these are a match, but hope something is helful
Looked for Patrick Kenney in 1850 census, but so many, could not find match.