Hello James,
Thank you for posting the image. The 1828 marriage to Elizabeth RANNEY is certainly a possibility. Its on Pallotts Index and says they are Widow and Widower, so an earlier marriage to look for.
Some census information...
1851 Census
5 Thanet Street
Grays Inn Lane, St Pancras, Middlesex
Name Estimated Birth Year Birthplace Relationship
Thomas Willy abt 1800 South Petherton, Somerset, England Head, Joinr. Carpenter
Elizth Willy abt 1806 Marylebone, Middlesex, England Wife
Thomas Willy abt 1833 Pancras, Middlesex, England Son, Apprentice to Cardmaker
Fredk Willy abt 1838 Pancras, Middlesex, England Son
Elizth Willy abt 1846 Pancras, Middlesex, England Daughter
1841 Census - Ref HO107 682 2 f27
5 Thanet Street, St Pancras
Thomas Willey 40 Carpenter
Elizabeth 35
Thomas 8
Frederick 4
John 5 months
All born in County
[kindly provided today by Barbara]
I have Thomas WILLY born 5 Sep 1799 South Petherton, Somerset. His parents were Thomas and Christian. Thomas was born 20 Apr 1767 but I've not been able to find him anywhere - the name and date is written on a small piece of card my mother has. I found a marriage for Thomas WILLY and Christian BROWN 3 Dec 1791 Yeovil, Somerset. I think this is probably the right one.
Best regards,
John