It is mentioned in the Lyrics "Happy Jack wasn't old, but he was a man He lived in the sand at the Isle of Man."
Isn't it supposed to be in the Isle of Man as it is a Crown dependency and should be treated nearly the same way as a country, like the phrases, I live in Egypt or I live in Australia?
“(He)… lived in the sand at/in/on the Isle of Man" makes no useful difference to anything.
Even beyond that, please choose two or three very small islands - as clearly opposed to to Australia, the island continent - then tell us why you you insist you should not live “in” rather than “at” or “on” any of them.
– Robbie Goodwin Aug 12 '18 at 20:09