Did not come to Australia as far as I can discover. No known issue although family stories say he married and had one child.  Unfortunately I have no details and am not even sure whether Adie was the family name or given name. What information I do have comes from a piece written some years ago by a cousin.

The brackets and '?' indicate my comments where I have had trouble reading the handwriting!

"Adie in fact, was a robust energetic wharfside brawler - the life-long friend and partner of G(reat) Grandfather Robertson. He was a member of the Lynvald (?or is it Synvald? I have not been able to locate a place of this name in Shetland)) - the area where the R's lived - farmed - fished and crofted. Part of their circuit took in the port of Archangel(in Russia). Here we will pull down the blind. Coming home they discovered that the 'lessee'(??) had fenced off the hinterland which cut off their oat fields. etc. G was so incensed that he "socked" him down. This operation entailed (??) the socks were pulled off, a rock the size of a big man's hand inserted and swung with access to the (??) of activity. For this assault GF was fined. He decided to emigrate. Adie vanished to other climates (?). His name occurs 7/8 times in the family out here (ie: Australia)."

Some credibility for this story seems to come from the fact that Authur Robertson's youngest son was named William Adie Robertson. William was the only child to get a second name and there is no earlier use of the name Adie in the family as far as I have been able to discover. The great grandfather mentioned was Arthur Robertson, father of John.   Their crofts were at Hellister in the Weisdale area and later at Jackville at the tip of Stromness. I have not so far located a record of the 'assault' in the Shetland Archives. Arthur Robertson was highly respectable in his later years and possibly Adie also gave up his wayward ways!

Jack McCue (my cousin) goes on to write -
"John was the the fourth child and second son, whose wife was the daughter of Adie. I have never been able to verify this, but it was accepted and related among the family.   John led a rumbunctious life - was wealthy before he was 20 - mainly from pirating against French smugglers. He took his turn 'on the whalers' and normal fishing.  When the American civil war errupted he turned his skills to gun running to support the English cause. He ran the blockade of Boston Harbour and was captured and sent back to England twice 'in irons'. (Seems some confusion here between the Civil was and the War of independance?).  He ventured a third run and was captured again. This time he succumed to Pneumonia and TB. He had a premonition and left his violin with Agnes (his oldest sister). A member of the clan has it. I hold a death notice placed in a local paper (in Australia) - a joint notice of the death of Barbara and John with the date of their passing"

I have seen a copy of this notice. Barbara was another sister whose death I have been able to verify with the Shetland record. The date in the notice for her death is incorrect so I also wonder whether John's death date is correct.

This is the sum total of what I know about John Robertson and his wife. It isn't very much but I am hoping you might be able to locate some connection in your Adie records.