GENERAL
Archif Melville Richards :
Cronfa Ddata Enwau Lleoedd ~ Place-Name Database
www.e-gymraeg.co.uk/enwaulleoedd/amr/
A Vision of Britain Through Time
Casgliad y Werin ~ People’s Collection Wales
www.casgliadywerin.cymru/ ~ www.peoplescollection.wales/
Coflein
www.coflein.gov.uk/cy/ ~ www.coflein.gov.uk/
Comisiwn Brenhinol Henebion Cymru ~ Royal Commission on the Ancient and Historical Monuments of Wales
Comisiynydd y Gymraeg ~ Welsh Language Commissioner
www.comisiynyddygymraeg.cymru ~ www.welshlanguagecommissioner.wales
Cyfoeth Naturiol Cymru ~ Natural Resources Wales
naturalresources.wales/
Cymdeithas Edward Llwyd
www.cymdeithasedwardllwyd.org.uk
Cynefin:
Mapiau Degwm Cymru ~ The Tithe Maps of Wales
cynefin.archiveswales.org.uk/cy/ ~ cynefin.archiveswales.org.uk/en/
Enwau Cymru
www.e-gymraeg.org/enwaucymru/ ~ www.e-gymraeg.org/enwaucymru/chwilio_en.aspx
Geiriadur Prifysgol Cymru ~ The University of Wales Dictionary
GB1900
History Points
www.historypoints.org
Institute for Name Studies
https://www.nottingham.ac.uk/research/groups/ins/index.aspx/
Llên Natur
www.llennatur.com/Drupal7/llennatur/
MOROL:
Sefydliad Astudiaethau Hanes Morwrol Cymru ~ Institute of Welsh Maritime Historical Studies
Old Maps Online
Papurau Newydd Cymru Arlein ~ Welsh Newspapers Online
papuraunewydd.llyfrgell.cymru/ ~ newspapers.library.wales//
Parc Cenedlaethol Eryri ~ Snowdonia National Park
Some Placenames in South Wales
someplacenamesinsouthwales.4t.com/index.html
Where’s The Path
wtp2recorder.appspot.com/wheresthepath.htm
Y Ganolfan Uwchefrydiau Cymreig a Cheltaidd ~ The Centre for Advanced Welsh and Celtic Studies
www.cymru.ac.uk/cy/YGanolfanGeltaidd/ ~ www.cymru.ac.uk/en/CentreforAdvancedWelshCelticStudies/
Yr Arolwg Ordnans ~ The Ordnance Survey
PLACE-NAME SOCIETIES
Society for Name Studies in Britain and Ireland
The English Place-Name Society
www.nottingham.ac.uk/research/groups/epns/index.aspx
Ulster Place-Name Society
DISCUSSION GROUPS
Yahoo Enwau Lleoedd
www.groups.yahoo.com/group/enwaulleoedd/
Facebook Enwau Lleoedd (Welsh place-names)