Two further sources of information about Rev David Jones of Dwyran
are written in welsh.
Hanes Plwyf Niwbwrch [History of Newborough Parish] by Hugh Owen,
published in 1949, contains a chapter on Capel Ebenezer, a Calvinistic
Methodist Chapel, with a footnote which provides details about the
ancestors of Rev. David Jones. The Newborough methodists first worshipped
at Tyn-rallt the home of his grandfather, John David [baptized 17
January 1725 son of Samuel David and Jane Bonn, at Newborough church]
http://www.tpwilliams.co.uk/newborough/hanes_pdf_ch13w.pdfThere is more at:
Hanes Methodistiaeth Môn [History of the Methodist church in Anglesey (1851)]
volume 2 page 506 and the following pages. It adds the detail:
After the death of Sion Dafydd [John David], Ty'n-yr-allt, the
religious cause was moved from there to the well-known place of
Plas-Newborough, the residence of the parents of the Rev. D. Jones,
Dwyran, and stayed at there for about 7 years. After that it moved
again to Owen Jones's house, near the village.
https://archive.org/details/methodistiaethcy02hughuoft/page/506The will of John David 1775 at the National Library of Wales
mentions his three sons John Jones, Owen Jones and William Jones and
one daughter Jane Jones.
NLW B/1775/16 John David; he was buried 21 August 1775.
http://hdl.handle.net/10107/269158