Dyfrig

The Buildings of Wales: Gwent/Monmouthshire (London: 2000), 360–1

Martyrs and Memorials: Merthyr Place-names and the Church in Early Wales (Aberystwyth: University of Wales Centre for Advanced Welsh and Celtic Studies, 2013), 88–9

Place-Names of Gwent (Llanrwst: Gwasg Carreg Gwalch, 2005), 123

(Prifysgol Cymru, Aberystwyth: 2001), 592    Darllen ar-lein

Thesaurus Rerum Ecclesiasticarum (London: 1754), 512

Ordnance Survey 6 inch map (1880s)

'Parochiale Wallicanum' yn Y Cymmrodor (1910), 79