1) Historian Hugh Thomas, 1931-, primary author on the page.
2) Hugh Thomas 1923-, author of books on Welsh history.
3) W. Hugh (Walter Hugh) Thomas, 1935- author of books on the deaths of famous Nazis.
Hugh M. Thomas, historian of Medieval England
5) The author of Spirit of the Blue is distinct from the others.
4) Mutations is a book of poetry whose author is likely distinct.
The author of Stonehenge Simplified is unknown (so go find out!)