Mary Hollyman 2nd GGmother

I have no DOB or DOD for Mary Hollyman.

Here is what I know so far. 26 April 1874 she was married in Rathnure to Michael Hennesy, her father was Richard and was a tailor and his father was James and was a labourer, The registration district for the married was Enniscorty Vol 9 pg 303 FHL Film #101253. I have FHL Film # 255912 saying that she had a child called Elizabeth Hennesy and FHL film #255975 saying that she had a child called Stephen Hennessy. 

I would like to find out as much as I can about her and her family, I thought the surname unusual and that I would find things easily but maybe I am looking in the wrong place. Any help would be appreciated.

Thanks

Pauline