Have you obtained the transcript of the Assizes Records - and when Elizabeth MORGAN married - what names did she give her children? i.e. family names.

As James & Sarah MORGAN gave their children these names

Thomas, James, Sarah, Frances, Elizabeth

There is a John & Ann JONES having children baptised in Newent from 1771
onwards and includes

Thomas 1771, Sarah 1780, Elizabeth 1786 etc. etc

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James MORGAN born Brinsop age 72 (1851 census)

CLDS

James MORGAN - christened 3 May 1778, Brinsop, parents: John & Elizabeth