Nigel, The information you have for the 1841 Census fits better with this family from Maughold / Ramsey:

Children of John Christian and Mary Callister, married 03 Sep 1815, Maughold, M038171, 00, 0106736, Film
John c. 19 Aug 1816 Maughold C038171 00 0106735 Film 6909402 Film
Margt c. 05 Jul 1818 Maughold C038171 00 0106735 Film 6909402 Film
Ann c. 05 Nov 1820 Maughold C038171 00 0106735 Film 6909402 Film
Edwd c. 21 Sep 1823 Maughold C038171 00 0106735 Film 6909402 Film
Isab c. 11 Sep 1825 Maughold C038171 00 0106735 Film 6909402 Film
Catherine c. 19 Oct 1828 Ramsey C038271 00 0106741 Film
Thomas Edwd c. 27 Jun 1830 Ramsey C038271 00 0106741 Film
William c. 30 Dec 1834 Ramsey C038271 00 0106741 Film
Elizth Jane c. 30 Dec 1834 Ramsey C038271 00 0106741 Film
Elizth Jane c. 03 Sep 1837 Ramsey C038271 00 0106741 Film

It would be a stretch to say that this is my Margaret Christian however as her birth is five years off (my Margaret was born 1823.) So could you check for me and see if John Christian and Mary Corlett's family are residing elsewhere, possibly close to Bigwell St, Douglas. This is where Charles Kaighin and his family can be found in the 1841 Census. Here is the Andreas family info from the IGI:

Children of John Christian and Mary Corlett, married 12 Apr 1815, Andreas, M035751, 00, 0106705, Film
John c. 05 Nov 1815 Andreas 7230623 88 0822581 Film
John c. 14 Dec 1816 Andreas 7230623 74 0822581 Film
William c. 07 Jul 1818 Andreas 7230823 35 0822555 Film
Margaret c. 11 Aug 1823 Andreas 7233917 14 0822075 Film
Jane c. 15 Jan 1827 Andreas 7232226 69 0822560 Film
Thomas c. 06 Jun 1832 Andreas C035751 00 0106705 Film

Died 20 Jun 1832

Thanks again,

Greg