Hello Greg,

Maughold burials have Catherine KAIGHIN, 77, of College St, Ramsey Sep 4 1864, but no Thomas Kaighin Maughold burial that I could find on Tom Corteen's transcripts earlier than that, back to the first Kaigh[in] in the burial register:
John KAIGHIN (Ramsey) May 11 1830.

It looks as though Thomas K's burial will be in Ramsey records which mostly haven't been transcribed or indexed, but can be seen on LDS film.

Other earliest Kaighins in Maughold burials were:
Mrs Ann KAIGHIN 66 Ramsey Sep 27 1833.
Edward KAIGHIN 22 Strand Street, Ramsey 26 May 1850.
Cathe KAIGHIN 17 months Strand Street, Ramsey 29 May 1850.
Walton KAIGHIN 2 Ramsey 14 Jul 1856.
John KAIGHIN 9 Sand Street, Ramsey 14 Jun 1860.
Edward KAIGHIN 4 Sand Street, Ramsey 13 Nov 1860.
John KAIGHIN 42 College St, Ramsey May 22 1863.
Thomas KAIGHIN 51 Quayle`s Ct, King St, Ramsey Sep 6 1872.
[To 1872]

Sue