This family were related to Morgan John Rhys, of wlfa in the same parish and was considered to be one of the oldest families in the parish.
It was apparently also a girl from this family who was referred to in the Welsh folksong
" Rwy'n caru merch o blwy' Penderyn"
( I love a girl from the parish of Penderyn)
I have information back to Edward Williams abt 1756 - 1846 and his wife Ann Jones of Coedcaedu, and their descendants, (including many in Wales, Australia and USA), but would welcome response from anyone else researching the same family