Averil, I think this was the family in 1851, because both John and his brother Joseph fit their ages in 1861:

Ancestry index, with my additions:
Name: Joseph Crellin
Age: 8
Estimated Birth Year: abt 1843
Where born: Peel, Isle of Man, Isle of Man
Relation: Son
Mother's Name: Ann Crellin
Gender: Male

Civil Parish or Township: German
Town: Peel
County/Island: Isle of Man
Country: Isle of Man
Household schedule number: 199
Piece: 2523
Folio: 163
Page Number: 46
Household Members: Name Age
Ann Crellin 60 widow b.Patrick
John Crellin 30 son Fisherman b.Peel
James Crellin 22 son mariner b.Peel
Ann Crellin 16 daur b.Peel
George Crellin 12 son scholar b.Peel
Joseph Crellin 8 son scholar b.Peel

Children of John Crellin & Ann(e) Kermod(e) married 25 JUL 1818 Patrick - there are 10 bapts on the IGI, 1820-1842.

Sue