Maughold parish register has John Kermod & Ann Killey married 23 Oct 1705.

These are the only bapts I found at that time in Maughold with father John Kermod [no mothers given for bapts at those dates].

John son of John Kermod bapt. 15 Jan 1707/08

Isable dau of John Kermod bapt 20 Oct 1710

William son of John Kermod bapt 19 Mar 1713/14

Jon KERMODE buried Oct 26 1738.

Wm infant of Jon KERMOD buried Dec 17 1747 [assume son of John b.1707/08].

John KERMOD buried June 21 1759.

Anne KERMOD als KILLEY buried Sep 23 1759.

John KERMOD Ballajora buried April 3 1791.

Constance Radcliffe wrote that John 1707-1791 was married to Elizabeth Kissag and one of a long line of Kermods farming at Ballajora, including five Johns who followed Richard (1648-1715).

However I found no sign of Esther, so you would need to confirm that she was from this Maughold family by checking the wills, and in particular this one:
KERMOD, Ann 1759-3 Mau KILLEY E w 0106384
[details from Brian Lawson's index].

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