There is a probate record for an Edmund Watkins (or Wotkins) late of Cwmbargoed Farm died 8th November 1864, leaving less than £300. The witness was Isaac Watkins son of Edmund. The probate was made 8 April 1865.
This probate was on a tree on An..ty. This tree also shows the baptism record for Gregory showing the fathers name Edmund Jenkins of Cwmbargoed, Farmer. Was this a mistake of name or perhaps because they were not married just muddied the water a bit? BUT, I see that Edmund Watkins father was (from the online tree) Jenkin Watkins!
Gregory was on the 1841 census with his parents and shown as Watkins.
Could'nt find death on freebmd for either Edmund Watkins or Jenkins but there is a record:
Edmund Watkins
England and Wales Death Registration Index 1837-2007
Name Edmund Watkins
Event Type Death
Registration Quarter Oct-Nov-Dec
Registration Year 1864
Registration District Merthyr Tydfil
County Glamorganshire
Event Place Merthyr Tydfil, Glamorganshire, Wales
Volume 11A
Page 244
Line Number 20
This is the same details as the Edmuna that CaroleW referred to.
Ray