This is the link to 1911 Census for Keaveney Family of Spring Gardens
Margaret Keaveney (Nee Rodgers) Age 73
She was married to Patrick Keaveney - possibly a brother to Michael.
Patrick Keaveny and Margaret Keaveny ( Nee Rodgers) had the following issue in Spring Gardens:
This is the link to the Marriage Date 28/02/1867 of Patrick (Age 27) (born c.1840) to Margaret - Note his father is also noted as Michael Keaveny of Spring Gardens
His wife Margaret is noted as being the daughter Age 25 of Patrick Rodgers Age 25 of Pollanarroo (a nearby townland).
The Records for Kiltullagh Parish commenced November 1839. So possibly No record for Patrick's Birth.
However there is a record for a Rose Keaveny born 15/09/1841 in Lowberry (Some areas of Spring Gardens may be referred to a Lowberry road or just Lowberry.)
This Rose was born to a Michael Keaveny and Mary Doud. Note the name - Rose carried down in Patrick's family - who is possibly a brother of Michael.
Patrick Died 10 Aug 1910 Age 72 Link Below
Note all these links are from free websites.
My Query, Would it be possible that he may have been 16 or 17 years older that what you have noted?