I suspect that John Cribbin was christened in Liverpool because that is where his parents were from, although he may have been born in the Isle of Man.
The 1871 census gives Rushen as the parish of his birth.
In the 1841 census of Rushen there is a William Crebbin and wife Margaret. He is 56 and a weaver. However she is probably Margaret Comish, whom he married in March 1841. This William was previously married to Eleanor Taylor (1819), with whom he had five children, inclding a John in 1825.

1851: 1 Park Street Poplar Middlsex HO107/1556 folio 361 page 37
John Cribbin Head Mar 37 Shipwright B IOM
Martha 36 wife b Liverpool
Thos s 9 b Liverpool
Mary dau 7 b Liverpool
Jno s 5 b Poplar
Wm s 3 b Poplar
Jas C s b Poplar

1861 RG9/300 folio 59 page 1
41 Bromley Terrace Bromley Middlesex
John Crebbin Head Mar 45 Shipwright B IOM
Martha 44 wife b Liverpool
Thos s 19 Teacher in Day School b Liverpool
Mary dau 17 b Liverpool
John s 15 b Poplar
William s 13 b Poplar
James s 10 b Poplar
George 8 b Bromley
Elizabeth dau 6 b Bromley
Anne dau 4 b Bromley
Samuel s ? 10 mos? b Bromley

1871 RG10/572 folio 137 page 12
41 Bromley Terrace Bromley Middlesex
John Crebbin Head Mar 56 Ship's carpenter B IOM Rushen
Martha 54 wife b Liverpool
Elizabeth dau 17 b Bromley
Samuel s 10 b Bromley

There is a death register for a Margaret Crebbin in Liverpool in the Jan-Feb-Mar quarter of 1841 vol 20 page 356. If this is your John's mother, it may shed some light on a next of kin.