Then we have:

Record_ID: 58290
Entry_Number: 210
Year: 1880
Month: Aug
Day: 3
Parents_Surname: ONIONS
Child_Forenames: Florence May
Fathers_Forenames: John
Mothers_Forenames: Ellen
Mothers_Surname:
Residence: Ruardean
Occupation: Collier
Officiating_Minister: C R Greaves Curate
Event: Baptism
Memoranda:
Notes:
Register_Reference: P275 IN 1/8
Page_Number: 27
Parish_Chapel: Ruardean
Soundex: O552

Thanks for this speedy response.Seems Thomas died at only 58 & I can,t find out why.We wondered if it was a pit accident?

Ref the above 1907 marriage of Thomas Gwynne GRIFFITHS to Florence Mary ONIONS, one of the witnesses is Bessie May Griffiths. Searching this site's PRs gives this Baptism, note Bessie is "adult" at this time, so could easily be the witness;

Record_ID: 43464
Entry_Number: 179
Year: 1898
Month: Mar
Day: 18
Parents_Surname: GRIFFITHS
Child_Forenames: Bessie May
Fathers_Forenames: Thomas
Mothers_Forenames: Maria
Mothers_Surname:
Residence: Michel Dean
Occupation: Nailer
Officiating_Minister: E P B Weber Rector
Event: Baptism
Memoranda: Adult
Notes:
Register_Reference: P 220 IN 1/14
Page_Number: 23
Parish_Chapel: Mitcheldean
Soundex: G613

GlosBMD has her Birth Record as;

Birth Details
Child Surname Child Forename Father Surname Mother Surname Mother's Former Name Year District Office Register Entry
GRIFFITHS Bessie May GRIFFITHS GRIFFITHS LEWIS 1883 Forest of Dean Westbury on Severn, Newnham 50 245

http://ww3.gloucestershire.gov.uk/bmd/MainMenu.aspx

and also that of Thomas, which suggests maybe her brother ?

Birth Details
Child Surname Child Forename Father Surname Mother Surname Mother's Former Name Year District Office Register Entry
GRIFFITHS Thomas Gynne GRIFFITHS GRIFFITHS LEWIS 1885 Forest of Dean Westbury on Severn, Newnham 53 238

GlosBMD also has their parents' Marriage

Groom Surname Groom Forename Bride Surname Bride Forename District Parish Building Year Register Entry
GRIFFITHS Thomas LEWIS Maria Forest of Dean Abenhall St Michael 1873 1 144

This FoD site has the full PR;

Record_ID: 483
Entry_Number: 144
Year: 1873
Month: Mar
Day: 1
Grooms_Surname: GRIFFITHS
Grooms_Forenames: Thomas
Grooms_Age: 25
Groom_Condition: Bachelor
Grooms_Occupation: Nail Maker
Grooms_Residence: Abbenhall
Grooms_Fathers_Surname: Griffiths
Grooms_Fathers_Forenames: John
Grooms_Fathers_Occupation: Nail Maker
Brides_Surname: LEWIS
Brides_Forenames: Maria
Brides_Age: 18
Brides_Condition: Spinster
Brides_Occupation:
Brides_Residence: Longhope
Brides_Fathers_Surname: Lewis
Brides_Fathers_Forenames: Edward
Brides_Fathers_Occupation: Coker
Licence_or_Banns: Not stated
Date_of_Banns:
Signature_or_Mark: Both sign
Witness_1: John Gwynne Griffiths
Witness_2: Ann Griffiths
Other_Witnesses:
Officiating_Minister: John Senior
Event: Marriage
Memoranda:
Notes:
Register_Reference: P1 IN 1/12
Page_Number: 72
Parish_Chapel: Abenhall
Soundex_Groom: G613
Soundex_Bride: L200

Searching this forum for Bessie proves the above family group, they are discussed in more detail in this prior thread.
http://www.forest-of-dean.net/fodmembers/index.php?id=27325

Both Thomas and his father John Griffiths are listed as Nailmakers in Kelly's Abinghall Trade Directory of 1894, http://freepages.genealogy.rootsweb.ancestry.com/~cbennett/abinghall1894.htm

Prior to this John was in Mitcheldean, as detailed within the prior thread. He is listed as a Nailmaker in the 1876 Morris Directory for Mitcheldean.
http://freepages.genealogy.rootsweb.ancestry.com/~cbennett/mitcheldean1876.htm

The skilled trade of nailmaking has long associations with the Abenhall/Mitcheldean area, as discussed on these prior threads.
http://www.forest-of-dean.net/fodmembers/index.php?id=33242
http://www.forest-of-dean.net/fodmembers/index.php?id=44335