The Betty Faithfull problem

The Faithfull ‘Tree W’ contains the following entry:

 

1.3.5.2.2.4.1.9.2 JOHN twin from my records was 009HC  1851 Census at 32 a Labourer North St, 34 North St 1861 Southwick age 78 Pauper 
   b  22.5.1775 Froxfield d 22.9.1854 Southwick, Southampton
   m 25.10.1792 Westminster ELIZABETH (BETTY) BEON  1781 age 12yrs? Chiddingfield Surrey  d 13.5.1855                
                Issue 1 JAMES 2 ELIZABETH 3 JOHN 4 MARTHA 

(NEED TO CHECK JOHN’S MARR DATE AND ELDEST CHILD JAMES BIRTH DATE)

 

Tree W has Elizabeth Beon because Westminster Parish records show that an Elizabeth Beon married a John Faithfull in Westminster in 1792. However, I think it unlikely that this is the same couple as my ancesters, since  their eldest child was not born until 1823;  there were other unrelated Faithfulls established in London at that time; and she would have been only 11 or 12 if born 1781 and married in 1792.

 

The 1851 census shows John’s wife as Betty Faithfull aged 70 (i.e. born 1781) born in Chiddingfold, Surrey. I suspect that this is a completely different person from Betty Beon.