Looking for the Parents of Elizabeth Martha Broderick

I am looking for information on my G Grandmother ELIZABETH MARTHA BRODERICK. b 1873?

Who were her parents and where do they come from originally? What I do know is Elizabeth Broderick was in NZ when she married my G Grandfather EDWARD HENRY HOLT in 1896 He was born in 1868 newzealand. I think he was a butcher.
They had 5 children
1897 John Wilfred Holt
1899 Dorothy Millicent Holt
1900 Isabel Sarah Holt
1904 Florence Broderick Holt
1908 Edward Horatio Holt

Any information on the Brodericks would be very helpful.