Nuttman Relhan Stringer Craven Et AL I Have Found IN the Journals My Great Uncle Alfred Nuttman Who Went to Victoria Australia from England IN 1855...

Alfred and Emma's and children etc etc etc. married in to various families (Stringer, Craven, Coumbe, Pemberton, Wheeler, Boyett, Hersell to name just a few).
All seem to be in the Victoria area.
I am the English side of the family and would love to know about the Australian side. I'm sure I must have cousins (long distant though they may be) but don't know how to start to track them down.
Any help would be gratefully appreciated.