I was just "googling" my brother's name and came up with your request.
My great,great grandfather was Michael Davey from Sligo and he married Eliza Healy in Ballarat on June 3rd 1865. On first look the date on the marriage certificate looks like 1863 BUT it is definitely 1865(I magnified it). His parents were Patrick and Margaret and her parents were James and Mary Cleary. Both families were farmers in Ireland. Not sure of Margaret's maiden name, still trying to work it out.
Don't know much about any of the Irish connections, not easy to find!