Convict John

Our "Australia royalty" rep has now been identified - thanks to the power of teamwork - and included in the Notables index , remembering that the index points readers to both notable AND notorious RUNCIMANs.
Upon re-examination,  with the passage of time and accumulation of more information, John's convict record had sufficient information to indicate he was the John born Duddingston (Edinburgh) to James and Mary (THOMSON) RUNCIMAN,.
This family was being researched for the mysterious George who  appears in the 1851 census as unmarried, with sister-in-law Isabella (nee STEWART), and assorted nieces and nephews.
Isabella is later documented as George's wife with both of them showing as parents of at least one of the "nieces & nephews" from the 1851 census - and they probably were, given Isabella's husband John was  in Tasmania when most were born!
Fate of John beyond his 1851 release is unknown.  Also unknown are the fates of his documented other son James born Cape of Good Hope, and possible other "wife" Elizabeth.