ANW logo

Archives Network Wales

Search the collections:        Search help | Advanced search   | Browse by repository

Browse the indices: Combined(searchable) Personal names Corporate names Places Subjects



[New to Archives?]

[Family history]

[Admin menu]

List of repositories  |  List of collections at Flintshire Record Office  |  Repository home page  |  Contact details

Flintshire Record Office
Plas Onn Papers

Reference code(s): GB 0208 D/PO

Held at: Flintshire Record Office

Title: Plas Onn Estate Papers

Short Title: Plas Onn Papers

Creation date(s): 1564-1914

Level of description: Fonds

Extent: 242 items

Name of creator(s): Plas Onn estate


Administrative/Biographical history: This collection comprising deeds and a few family, estate and legal papers, provides an almost unbroken record of the Plas Onn estate from the late sixteenth to the early twentieth century. In a deed of 1708, a certain Griffith Williams, clerk, is the first person to be described as "of Plas Onn", though his family appears previously to have been living in Nerquis. His kinsmen also owned lands in Llanarmon yn Ial and Llanferres, co. Denbigh. By 1712, Plas Onn had passed to a branch of the Coytmore family of Llanllechid, co. Caernarvon. At that date the estate comprised lands in Nerquis, Arddynwent, Bryncoed, Brynkinallt, Tre'r beirdd, Hartsheath and Mold townships. It remained in the hands of the Coytmores, though heavily mortgaged, until the death of Richard Coytmore without issue in c.1766. It then descended to John Williams of Ruthin and Edward Jones of Llandyrnog, co. Denbigh, as co-heirs of the late Mary Coytmore, mother of Richard Coytmore, and of the late Mary Adams, his niece. John Williams did not maintain his interest in the estate, which together with lands in Denbighshire, passed in turn from Edward Jones to his sons, William and Thomas (died c.1815). Edward Jones Hughes then inherited the estate, though his relationship is not explained, and from c.1834 - c.1882 Plas Onn was held together with lands in Llanarmon yn Ial and Llanfair Dyffryn Clwyd by Robert Hughes. On his death the inheritance came into dispute between Frederick James Hughes of London, Margaret Simner of Denbigh, Jane Jones of Denbigh and later of Rhyl, and John Jones of Denbigh, all of whom claimed to be the lawful heirs of Robert Hughes. After a long legal battle the estate was divided. John Jones took the Denbighshire portions but very quickly dissipated his inheritance and was finally found drowned in the river near Llanfair. F.J. Hughes took Plas Onn and the Flintshire estate, though sharing the mineral rights with Jane Jones. The property did not, however, prove to be as lucrative or rich in minerals as had been hoped and in 1903 it was put for sale in lots.


Scope and content/abstract: Deeds, 1564-1902, rentals, [c. 1857]-1861, family and estate correspondence including letters relating to lead and coal mines, 1880-1907; and legal records, 1773-1914, including correspondence, 1880-1914, mainly relating to the dispute over title to the Plas Onn estate.


Language/scripts of material: English, Latin

System of arrangement: Arranged chronologically into the following: deeds; estate records; family papers; and legal records.

Conditions governing access: No restrictions.

Conditions governing reproduction: Usual copyright regulations apply.

Finding aids: Hard copies of the catalogue are available at Flintshire Record Office, National Library of Wales and the National Register of Archives. Catalogue is searchable online at:


Appraisal, destruction and scheduling information: All records deposited at Flintshire Record Office have been retained

Accruals: Accruals are not expected

Archival history:

Immediate source of acquisition:



Note: Title supplied from contents of fonds

Archivist's note: Compiled by Mair James for the HMC/NLW Family and Estates project, updated by Steven Davies at Flintshire Record Office. The following source was used in the compilation of this description: Veysey, A.G., ed., Guide to the Flintshire Record Office (Flintshire County Council, 1974).

Rules or conventions: This description follows ANW guidelines based on ISAD(G) Second Edition; AACR2 and LCSH

Date(s) of descriptions: October 2001

Coal mines and mining | Wales | Flintshire
Deeds | Wales | Flintshire
Lead mines and mining | Wales | Flintshire
Plas Onn Estate | Records and correspondence

Personal names
Coytmore family , of Plas Onn
Hughes family , of Plas Onn

Corporate names
Plas Onn Estate (Flintshire, Wales)

Flintshire (Wales)

List of repositories  |  List of collections at Flintshire Record Office  |  Repository home page  |  Contact details