Eyersh on Family Tree Circles

I am trying to locate anything about my ggg grandmother Sarah Brenan and her family who came to New Zealand on the Ernestina in 1865. The family according to ships records consist of: Father: Edward Brenan Mother: Fanny/Frances (nee Carpenter) Children - William, Mary, Henry, Richard, Fanny, Joseph and Lyndon. Sarah Brenan married my ggg grandfather Nixon Scott in New Plymouth, New Zealand in 1873 but I cannot locate any details of the Brennan family to link them together. Sarah Brenan's brother Joseph was a successful businessman in Paeroa and it would appear that the family may have lived in that area.