The only "David Hanrahan" occurring in Griffith's Primary Valuation of Tenements (c. 1849) for county Kilkenny occupied land in Kilmurry, Thomastown. A memorial in Columbkille Cemetery bears the following inscription
"Of your charity pray for the soul of DAVID HANRAHAN of Blessington, who departed this life on 8th November, 1875 aged 54 yars. Also his mother HONORA HANRAHAN who died April 23rd., 1870 aged 70 years. Also his loving wife ANASTATIA M. HANRAHAN who died 22nd April, 1894 aged 58 years and PERER JOSEPH HANRAHAN, Blessington."
The occurrence of the christian/first names NORA and ANASTATIA in your family suggests, but is not conclusive evidence, that this is your family.
While not then related, the family is well known to me and the then residence in Blessington is occupied by a cousin through a later marriage. The late Peter Hanrahan was, for a number of years a member of the local authority, Kilkenny County Council and was an unsuccessful candidate for the national parliament, Dail Eireann. His son Joe was an unsuccessful candidate in the June, 2009 local elections.
If you can provide any additional information, which may be obtainable through public or church records, it may be possible to verify that this is your family.