Hello, Neil,
George's birth & bapt is shown in the IGI with parents Duppa & Elizabeth but this is a submitted entry therefore cannot be verified. He had a brother
Richard Duppa Jenkins, born 20th May 1815, bapt 10th Sept. 1815 St George the Martyr Southwark
However, with the unusual name of Duppa I found this.
1841 census
H0/107 427 book 13 folio 16 Page 5
White Horse Lane Dorstone Herefordshire
Duppa Jenkins age 74 Lighterman not born in county
and this
Death
Duppa Jenkins
June ¼ 1859 Westminster 1a 168
It would be interesting to see who registered the death.
Info for Richard Duppa Jenkins
1851 census
HO107/1579 folio 109 page 1
4, Marks Place Putney Surrey
John Puzey head age 59 Carpenter
Elizabeth wife age 60
Richard Duppa Jenkins Wid age 35 Visitor Carpenter b Vauxhall
Richard Duppa Jenkins sonn age 4 b Camberwell
Birth
Richard Duppa Jenkins
Mar ¼ 1847 Camberwell 4 53.
No marriage entry found for a Ricahrd Duppa, several possibles for a Richard Jenkins..
Hope this helps,
Meliora