This may be a long shot, but a John AUSTIN married Catherine DEAN in Appledore, Kent 9 Sept 1822. There is a John AUSTIN baptised to parents John and Catherine 29 June 1823 at Burmarsh, Kent, and 6 subsequent children all with parents John and Catherine (Edward has mother as "Catherine Dean [or Dane?] AUSTIN"):
1823 John
1824 Elizabeth
1826 Edward
1827 William
1830 Catherine
1832 Julia
1833 Sophia
I can't see this family in any of the English censuses, so presumably immigrated.
Modified to add Catherine's alternative spelling of her middle name