felixp21 wrote:well, Mahmoud, it seems google can indeed establish the relationship

as I said in the first post, the relationship is at "great-grandfather" level. So, I guess you are just repeating what I said.

Not to be a stickler but I'm not really repeating what you said.
In your first post you said that the lady in Hong Kong said
"The great grandfather of Anthony Barton, the current proprietor of Leoville-Barton actually wrote the song "Waltzing Matilda"". Subsequently, based on a Google search, you said that
"His descendants still live at Chateau Leoville-Barton". My reading of the information that I found on the internet was that neither of these assertions was likely to be correct. There there was a chance that Banjo Patterson could be a grandfather, but certainly not a great grandfather, only if his daughter had returned to Ireland and married Anthony Barton's father. There was only 26 years between the birth of Banjo Patterson's daughter Grace (1904) and the birth of Anthony Barton (1930), not enough time for another generation to make him a great grandfather descendant.
The great grandfather theory only works if there was an indirect link, that Anthony Barton's great grandfather might somehow be related to Banjo Patterson's maternal grandfather. Despite not finding any information establishing this connection I assumed this might be correct because of the Barton family member who mentioned a relationship to you in Hong Kong. However nothing in my seach establish this link.
Please don't misunderstand, I have a deep interest in Bordeaux because many of my initial purchases for cellaring were Bordeaux wines and I also read the article in Decanter when Anthony Barton was made Decanter magazine's Man of the Year in 2007. That is why when I first read your post I said to my other half (she is an Aussie) that I did not feel that it was correct because, as I told her, Anthony Barton's family came from Ireland and it did not seem correct that he could be a descent of someone from Australia. If you're interested here is a link to the Decanter article by Steven Brook on the Man of the Year:
https
://www.decanter.com/features/man-of-the ... on-247472/
By the way, I discovered that Anthony Barton had an affair with Princess Margaret (and no, it is not mentioned in the Decanter article). Apparently Lord Snowdon and Anthony Barton were school mates and at one time Lord Snowdon is supposed to have said to Barton "I wish to hell she'd take a lover and leave me in peace". According to a biography of Lord Snowdon:
Then, one evening, with no preliminaries, Margaret said to Barton: 'Let's go to bed.'
Startled, he replied: 'No, I think our relationship's not that.' She edged closer and said: 'Well, I think you could be a bit more cuddly.'
Few men could have resisted her, and Barton did not, though his conscience troubled him. He felt there was more than a hint of revenge in her enthusiasm for him. An affair with one of her husband's oldest and closest friends was a classic way for a neglected wife to strike back.
As you can see I quite enjoyed the research.
Mahmoud.