1990 Enwau Lleoedd (Canolfan Astudiaethau Addysg Aberystwyth)

1991 Enwau Lleoedd Bro Dyfrdwy ac Alun (Gwasg Carreg Gwalch)

1994 The Place-names of East Flintshire (University of Wales Press)

1995 Place-names of Dee and Alun (Gwasg Carreg Gwalch)

1997Ar Draws Gwlad : Ysgrifau ar Enwau Lleoedd (with G O Pierce,T Roberts) (Gwasg Carreg Gwalch)

1998 Enwau yn eu Cynefin - Darlith Goffa Morgan Llwyd 1997(Ysgol Morgan Llwyd)

1998 Names and Places - The Morgan Llwyd Memorial Lecture 1997 (Ysgol Morgan Llwyd)

1998 The Place Names of Wales (University of Wales Press)

1976 ‘The Welsh Place-Names in the township of Bannel’, Buckley 4

1982 ‘English and Welsh Place-Names in three Lordships of Flintshire’, Nomina 5

1982 ‘Gwedd-yoking’, Bulletin of the Board of Celtic Studies 30

1986 ‘Some Place Names in Pentrobin Township’, Buckley 11

1987 ‘English Place-Names and Welsh Stress Patterns’, Nomina 11

1988 ‘Names in Colleges and Schools’, Recent Innovations in Initial Teacher Education (Cheltenham)

1997 ‘Old English Place-Name Elements in Domesday Flintshire’, Names Places and People (Paul Watkins, Stamford)

1998 ‘Ffridd’, Y Naturiaethwyr 2/3 (Cymdeithas Edward Llwyd)

2000 ‘Cymreigio Enwau Lleoedd yng nghylch Wrecsam’, Trafodion Bangor 1 (ed. B. Jarvis, P. Lynch), (University of Wales Bangor)

2000 ‘The Place-names Ystrad Alun, Yr Wyddgrug and Moldsdale’, Ystrad Alun 1 (ed. N W Jones), (Mold Civic Society)

2001 ‘The Names of the Townships of Mold’, Ystrad Alun 2 (ed. K L Gruffydd), (Mold Civic Society)

1979 ‘Beware Place-Names’, Clwyd Historian 4

1979 The Roman Road, Clwyd Historian 4

1983 ‘A Dragon in Sheep’s Clothing’, Clwyd Historian 12

1984 ‘Dirty Mile’, Clwyd Historian 14

1984 ‘Sour Milk Hall’, Clwyd Historian 14

1984 ‘Argue’, Clwyd Historian 14

1984 ‘Zewell the Magic Dragon’, Clwyd Historian 14

1985 ‘Pres ‘ta Tun?’, Llafar Gwlad 7

1985 ‘Memrynau’n Murmur’, Llafar Gwlad 8

1985 ‘The Clwyd Place-Name Council’, Clwyd Historian 15

1985 ‘Caergwrle’, Clwyd Historian 15

1985 ‘Goody! Goody!’, Buckley 10

1985 ‘Enwau Lleoedd Clwyd’, Llafar Gwlad 9

1987 ‘Cawr, Ffedog a Chraen’, Papur Fama

1992 – 1993 ‘Enwau Capeli Glasinfryn, Penygarnedd, Drindod, Barachia a Capel Mawr’, Y Cylch 38 - 43

1993 – 1994 ‘Enwau Lleoedd :Ditectif Geiriau’, Prentis 7/1 - 7/8

1994 – 1995 ‘Ditectif Geiriau’, Western Mail, August 1994 - January 1995

1996 – 1998 ‘Enwau ein Bro’, Papur Menai 194 - 217

1985 ‘Welsh Surnames’ T J a Prys Morgan (1985), Nomina 10

1990 ‘Cornish Place-names Elements’ O Padel (1985), Nomina 13

1990 ‘A Popular Dictionary of Cornish Place-Names’ O Padel (1988), Studia Celtica 24 – 25

1990 ‘A Popular Dictionary of Cornish Place-Names’ O Padel (1988), Y Traethodydd

1993 ‘Yn ei Elfen’ Bedwyr Lewis Jones (1992), Taliesin 81

1993 ‘The Place-Names of Pembrokeshire’ B G Charles (1992), Llais Llyfrau

1999 ‘Enwau Tir a Gwlad’ Melville Richards (ed. B L Jones) (1998), Taliesin 104

1964 ‘Another Augustine Baker Manuscript’, Studien en Tekstuitgaven van Ons Geestelijk Erf 16

1989 – 1990 ‘The Upholland Anthology : An Augustine Baker Manuscript’, The Downside Review 369 – 371

1991 ‘Sam a’i Fam’, Odl a Chodl (Y Lolfa)

1993 ‘Gardd Nain’ (a translation of‘Granny’s Garden’), 4 Mation, (with Elwyn Owen)

200 ‘Hanes Capel Barachia 1817-1917’ gan Hugh Parry (ed, with Harri Owain Jones), (Gwasg Pantycelyn)