ref the 1881 census that osprey refers to above, just had a look at it, the address is def ffosyffwrn,
ffos - ditch/moat/trench. y - the. ffwrn - oven. the occupant is james griffiths b. 1802 former carpenter, this is not the family i have followed, although this james b.1802 may well be a brother of the william griffiths b.1809 carpenter of pantycoed, b. at mydrim who married amy which i followed.