This passage from a book called ‘The History of the MacKenzies’ states: “Patrick’s daughter bore a son to Alexander, Lord of the Isles and Earl of Ross, who was called Austin (Ùisdean or Hugh) or as others say, Augustine. She was twice before the King, as MacDonald could not be induced to part with her, on occasion of her great beauty. The King said “that it was no wonder that such a fair damsel had enticed Macdonald.”
Also, in my research, I found that Hugh had many brothers and sisters, children of Alexander and his O'Bealon wife.