The only one I can find in 1901 is
High St Bargoed gelligaer Glam
I.Felix Davies Boarder U 31 Builder b Brecon
in the household of Edward Evans (Commission agent) and family
RG13 5022 136 17



You could look in Historical Directories -sometimes Undertakers are listed along with joiners.
I know there used to be a Davies undertakers in Bargoed - as when I lived in bargoed (1980's) we were friendly with an Arthur davies (who would be abt 70 yrs of age then) whose father had been the local undertaker.
I still have Arthur's father's silk top hat -which Arthur gave to me to wear to a Bob Dylan concert!!!!!!!!!!
(always have an unususal hat to wear when going to see Bob!!!) LOL!
Suz