There were many illegitimate children baptised in Maughold between 1818 and 1830, but the father was given in all cases except for:
Ann Jane Illegitimate dau of Mary Carran 20 Mar 1825.
Jane Illegitimate dau of Margaret Corlett 30 Oct 1825.
This looks like the same Margaret Corlett with whom Jane Kinrade was living in 1841.
John Corlett & Margaret Corlett didn't marry until 28 Aug 1830, in Maughold.
3 39 Thalloo Mitchel John CORLET Head MAR 55 Farmer Maughold
3 39 Thalloo Mitchel Margaret CORLET Wife MAR 59 Maughold
3 39 Thalloo Mitchel John CORLET Son 26 Miner Maughold
3 39 Thalloo Mitchel Margaret CORLET Daughter 24 Maughold
3 39 Thalloo Mitchel Mary CORLET Daughter 22 Maughold
3 39 Thalloo Mitchel Jane CHRISTIAN Granddaughter 10 Scholar Bride
Jane CHRISTIAN bapt 5 Feb.1851 Bride dau of Thomas CHRISTIAN & Jane!
Looks like we solved it.