Not sure but may be worth looking into further?

There is a Rudge marriage at Newland with John Willetts and Susannah Willetts as witnesses

27975
Entry_Number 97
Year 1830
Month Oct.
Day 31
Grooms_Surname RUDGE
Grooms_Forenames William
Grooms_Age [not
Groom_Condition Bachelor
Grooms_Occupation [not stated]
Grooms_Residence Hundred of St Briavels
Grooms_Fathers_Surname [not stated]
Grooms_Fathers_Forenames [not stated]
Grooms_Fathers_Occupation [not stated]
Brides_Surname MARSHALL
Brides_Forenames Ann
Brides_Age [not
Brides_Condition Spinster
Brides_Occupation [not stated]
Brides_Residence Hundred of St Briavels
Brides_Fathers_Surname [not stated]
Brides_Fathers_Forenames [not stated]
Brides_Fathers_Occupation [not stated]
Licence_or_Banns Banns
Date_of_Banns [not stated]
Signature_or_Mark Both mark
Witness_1 John Willetts
Witness_2 Susannah Willetts
Other_Witnesses
Officiating_Minister Yate Fosbroke Curate
Event Marriage
Memoranda
Notes
Register_Reference P175 IN 1/5
Page_Number 33
Parish_Chapel Hewelsfield
Soundex_Groom R320
Soundex_Bride M624

There is a marriage in Bishop's transcrpits for Monmouth on Ancestry in 1823 for John Willetts to Susannah Rudge

John Willetts
Gender:Male
Marriage Date:18 May 1823
Marriage Place: Bts, Monmouth, Monmouth, England
Spouse: Susanna Rudge
FHL Film Number:992324
Reference ID:cn 254

thought maybe Susannah could be Ann as it wasn't unusual for names Susannah/ Hannah/ Ann to be same person.

Simone