While I can find further references to Llwynygofre etc. it is not clear there is a family relationship to the "Richards" of Bryn Isaf(aka Bryn Issa).There may well be one,but it is yet to be discovered.
Looking at nearby properties at the appropriate time we have,for instance:-
1765
Letticia Richards of Rhyd Llwyd, parish of Lledrod, co. Cardigan, widow, and Thomas Richards of Y Penbrin, parish of Lledrod, aforesaid gent;. 2. Richard Edwards of Navy Hall, parish of Lledrod aforesaid, gent. Grant for £10 of a seat or pew adjoining the reading desk or pulpit in the parish church of Lledrod and belonging to a tenement called Pant y Camddwr.
and,although dated 1777,the following refers back to 1762
Indenture, being a declaration by Morgan Harry of Fronfelen, p. Llanychaiarne, co. Card., gent., and Letitia Richards of p. Llanygrwyddon, co. Card., widow, that a fine had been levied at the Great Sessions for co. Card. on 14 Aug. 1762 by Elizabeth Richards, widow, the said Letitia Richards, Thomas Richards, gent. and Jane his wife, of two tmt's called Penbryn-issa alias Tythyn-y-bryn-merllyd, and Bryn-merllyd alias Tythyn-bryn-issa, and of a parcel of land called Gorse-glan-teify (60 a.), p. Lledrod, co. Card., to the use (as to the said parcel of land) of the said Morgan Harry in fee, but that no uses had been declared as to the said two tmt's, they therefore declared that the said fine should enure (as to the said two tmt's) to the use of William Davies of Penbrynn, p. Llanvihangel Lledrod, co. Card., gent., in fee simple. It recites that the said Elizabeth Richards, Thomas Richards and Jane his wife had all dec., and that the said two tmt's were the inheritance on the said William Davies.
The Thomas Richards referred to is a "gent" and likely to be owner rather than tenant.Perhaps also the Jane referred to is the one from the 1789 will(?).This Thomas Richards,I think,is of the family referred to previously,where a Thomas Richards is seen in Westminster.There must be a reasonable chance that John and James are of this family,either the sons of a Thomas Richards,or of a son of Thomas Richards(perhaps called John?).
The concern is whether the title to the properties passes to the William Davies referred to(I'm not sure what an inheritance ON William Davies means),and,if so,how it reverts to John Richards-or whether he has some other form of rights,short of ownership.
Regards
Roger