Hi
This book is available to researchers, but not for loan, at the County Library in Caernarfon; don't know if it's available at the County Archives. It's dwelling orientated, and you need to look up the dwelling name and search within for the person's name. Bodgarad is one of the dwellings featured.Stanley and siblings are featured and part of their ancestry traced back to an Elin Williams/Hugh Owen (no info) thro' their son William Hughes (Tynewydd, Pont y Wlad, and Bodgarad/Bodangharad, b. 1732, d.1777); and to Catherine Cadwgan, Y Benallt, d.1725/William Brereton, Y Benallt, d.1722.
By looking up another dwelling, forgot to note the name (page 236?), you can trace back, William Brereton's ancestry to a Richard Hughes, d. 1680 on one side of his family, and on the other side to a marriage in 1570. Using cross references it might be possible to obtain further info from entries for other dwellings.
EmyrBorth