My 6th Great Grandparents are Thomas "The Contriver" Radcliffe (B. Abt. 1700; D. 1743) of the Curragh and
Jane Curlett (1702-1752) from Maughold.

My 7th Great Grandfather is John Radcliffe (B. Bef. 1682; D. Abt. 1701) of the Curragh. I don't know who he was married to, but would love to find out...
Your Thomas is not the son of John d. 1701. This John is my 5th great grandfather whose son Thomas married Alice Radcliffe. John d. 1701 was married to Margaret Cannell Radcliffe Kneale. Check out THE RADCLIFFES OF ANDREAS
by Constance Radcliffe, BA for a good overview of the complicated Radcliffe of Andreas.