Troedyrhiw,Nevern (PEM),208519,235857
The next page on the census lists a number of other houses in the same hamlet so it is not a single house name. It is on the Cilgwyn Quarter of the Nevern census sheet so I am sure it is this one.
Alas the 1861 Nevern census sheets appear to have been lost so I can't find it 10 years on.