Looking for Savage of Ireland

I am trying to trace Jane DOUGHETY OR GALBRAITH born in ireland in 1831, we presume she married a mr SAVAGE but do not know his first name. we also presume he either separated from her or diedbefore she sailed for NZ on isles of the south in 1873 from Plymouth headed for Lyttleton . Jane died from dysentry six days out from port and her 4 children settled in NZ her eldest daughter Jessie wasalready married to Robert PATON she was 24, Alice SAVAGE was 19 and she married Francis MULLHOLLAND, Hans was 17 he did not marry. and then thare was Roland or Rowland who was 15 and he married a widow Betsy SMITH nee MCKAY.