I also looked through the records for Edward Bergin and Bridget O'Mara/O'Meara/Mara/Maher, parents of Ellen Bergin born 28 March 1895. Also records for their children, hoping to find an O'Reilly as an informant on the records. But I didn't. I have their information, if it turns out that they are the right family or if you want it. 
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Edward Bergin (c 1871, Kilkenny - )
              d ? 2 March 1961, St Luke's Hospital, Kilkenny, 91, widower, retired builder's laborer, informant: Oliver O'Hare, St Lukes
             1901 House 5 in Farmley (Burnchurch, Kilkenny)
             1911 house 14 Ennisnag (Ennisnag, Kilkenny)              
http://www.census.nationalarchives.ie/pages/1911/Kilkenny/Ennisnag/Ennisnag/531145/      + Bridget Mara/O'Meara/Maher (c 1872, Kilkenny - )
                 d ? 13 June 1915, Glountha, Thomastown RD, 42, married, laborer, informant Edward Bergin, Glountha, no relation stated, present at death)
                 d ?16 April 1949, Callan, age 72, widow, informant son James "dwells at Callan?")
Children:
    -  Pierce Bergin (8 August 1893, Coolbricken, Kilkenny RD, informant: the mother
    -  Ellen Bergin (28 March 1895, Seville Lodge, Kilkenny RD, informant Margaret Veall, Black Mill St
   1911: cook, private family High Street Kilkenny
    -  Bridget Bergin (23 October 1896, Seville Lodge, Kilkenny RD, informant Margaret Veall, Black Mill St
   1911: maid, private family High Street Kilkenny
   marriage or marriage not found in Kilkenny, Callan, or Thomastown, 1915 - 1999   
    -  Margaret Bergin (7 December 1898, Barrack St, Kilkenny RD, informant: the mother
   1911: with parents
    -  James Bergin (24 November 1900, Farmley, Callan RD, informant: the mother
   1911: with parents      
    -  Mary (10 December 1902, Farmley, Callan RD, informant: the mother
   1911: with parents      
    -  Edward/Edmond Bergin (23 February 1905, Farmley, informant Margaret Holden, Bridge Street, Callan, present at birth, Callan RD
   1911: with parents      
     - Kathleen Bergin (24 February 1908, Jail St, Kilkenny RD, informant: the mother
   1911: with parents      
     - Patrick Berrigan (11 May 1910, Glountha, Thomastown RD, informant: Mary Murphy, farmer somewhere
   1911: with parents