Looking at the 1851 census, with John THOMAS, unmarried age 50 (the address looks like, Skin House, Newnham) - John being born in Westbury, Glos (and I think a Farmer - as is the widow Mary) - which ties up with the occupation of John when he married 'Mountjoy' in 1853

FOD records - Marriage at Newnham- 7 June 1853

John THOMAS, widower, Farmer, father: John THOMAS, Farmer

married

Mary Ann MOUNTJOY, Spinster,
Father: William MOUNTJOY, Coal Miner, by licence

witnesses: Thomas MOUNTJOY + M.A. (illegible)

The 1841 census with John THOMAS living with Henry & Charlotte...

?

Henry THOMAS married Charlotte JENKINS, at Newland 10 October 1825

(both Hundred of St Braivels)

witnesses: Thomas WILLIAMS and Mark of Elizabeth HINDEN

?

There is a Baptism of a Henry THOMAS - 5 April 1807, parents John & Ann @ Newent

If you use the Advance Search for children of John & Ann THOMAS in Newent, John was a Barge Owner, Boatman - so some siblings, could have been baptised elsewhere?

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1841,1851,1861,1871,1881,1891,1901,1911 census' all transcribed on Ancestry