I am trying to trace my great great grandfathers family. They lived in Ireland and Williams son, Thomas and his wife Johanna migrated to Australia in approx. 1844.I know the history once they arrived in Oz but can not seem to get back any further than William Peacock who married margaret Jackson. William was born in 1771 in marghafelt, County Derry Ireland. Anyone who has any info it would be hugely appreciated Thanks