Henry Young was a real person. He might have had various experiences. Without more context, it's difficult to say specifically who he was. He could be an ordinary person with an interesting life story, or perhaps someone who was involved in a particular historical event, a social movement, or a local community's story.
Since we don't know the full story of Henry Young, the most significant aspect could be his relationships. Maybe he had a profound impact on the people around him, either in a positive or negative way. His interactions with family, friends, or colleagues could be the key part of his story. He could have been a great friend who was always there for others, or he might have had a complex relationship with someone that shaped his entire life.
Since I don't know the specific 'Henry Sugar real story', I can't say exactly who he is. He could be an ordinary person with an extraordinary story, or perhaps a fictional character based on a real - life prototype.
Yes, Loch Henry could potentially be based on real events or have elements inspired by reality. But it might also have fictional aspects added for narrative purposes.
Henry Sugar's story isn't real. Authors often come up with imaginative tales that capture our imagination, and this is likely one of them. It's all part of the creative world of storytelling.