There are photographs of the following chapels on the Penllyn.com site; Capel Edern (CM)
Church and chapel data from The Religious census of 1851 : A Calendar of the returns relating to Wales, Vol 11, North Wales. Ed. by Ieuan Gwynedd Jones, UWP,1981. The names given towards the end of each entry are those of the informants.
Edeyrn Parish; Statistics; Area 1380 acres; Population 297 males, 347 females, total 644
Edern Parish Church Attendance - usual - 20/25 Informant; John Williams
Edern Manuscripts (.. relates in the main to.. Ellis James, who farmed the Vaynol home farm near Bangor) - details of extant records on Archives Network Wales "These include accounts relating toEdern C.M. Chapel, 1806-1827; ....... detailed notes of proceedings of, and sermons preached at, the Arfon Monthly Meeting, 1848-1875; notes of proceedings at C.M. Assemblies held in Caernarvonshire, 1853-1858 and the Associations of 1864 and 1870....."
Glanrhyd papers 1780-1964 (predominantly 1826-1918) - details of extant records on Archives Network Wales "Papers of the Hughes family of Glanrhyd, Edern....." "Additional deposit include; papers for the locality of Edern, including records of the Porthdinllaen branch of the Royal National Lifeboat Institution, 1949-1979; papers relating to the South Caernarfon Creameries acquired by J. E. Roberts; religious papers, 1839-1987, concerning various chapels and minister of religion in Caernarfonshire......"
You can see the administrative areas in which Edern / Edeyrn has been placed at times in the past.
Select one to see a link to a map of that particular area.