William's wife in 1861 is Elizabeth, not Eliza and as birth entries on GRO index show her maiden name was Griffin or Griffen (also in 1851).
As already mentioned, William Caunt and Elizabeth Griffin married 1846 Shillington.
His age is wrong on 1861 census - shows him as 27 but 1851 census also shows him (with Elizabeth) as 27.
His baptism is actually 3/12/1822 Garthorpe, son of William and Charlotte.
Annette