I followed this family for a few generations many years ago when I thought they were my ones. I have notes from the will of Thomas Corkill of the Ard, Maughold, who d.27 Aug 1834 (will) aged 54 (burial) which matches the son of John Corkill & Margt Cashen who was bapt 25 July 1780.
He left John his eldest son the field known as Booiley Voar, as the Radcliffes wrote, and also mentioned sons Thomas and William.

Margaret Corkill widow of the Ards, Maughold, had earlier left an 1825 will leaving Thomas her part of the same field, and also mentioned her daughters Easter/Esther (wife of Edward Skillicorn), Margaret, and Catharine.

Sue