| Edgar and the eight kings, AD 973: textus et dramatis personae DE Thornton Early Medieval Europe 10 (1), 49-79, 2001 | 36 | 2001 |
| Kings, Chronologies, and Genealogies: studies in the political history of early medieval Ireland and Wales DE Thornton Occasional Publications UPR, 2003 | 27 | 2003 |
| Hey, Mac! The name Maccus, tenth to fifteenth centuries DE Thornton Nomina 20 (1097), 67-98, 1997 | 21 | 1997 |
| All the world wide web's a stage: Improving students’ information skills with dramatic video tutorials DE Thornton, E Kaya Aslib Proceedings 65 (1), 73-87, 2013 | 19 | 2013 |
| Orality, literacy and genealogy in early medieval Ireland and Wales DE Thornton Cambridge Studies in Medieval Literature 33, 83-98, 1998 | 19 | 1998 |
| The genealogy of Gruffudd ap Cynan DE Thornton Gruffudd ap Cynan: a collaborative biography, 79103, 1996 | 18 | 1996 |
| Maredudd ab Owain (d. 999): the most famous king of the Welsh DE Thornton Welsh History Review= Cylchgrawn Hanes Cymru 18 (4), 567, 1997 | 16 | 1997 |
| Domesday names: an index of Latin personal and place names in Domesday Book KSB Keats-Rohan, DE Thornton Boydell & Brewer, 1997 | 15 | 1997 |
| Early medieval Louth: the kingdom of Conaille Muirtheimne DE Thornton Journal of the County Louth Archaeological and Historical Society 24 (1 …, 1997 | 14 | 1997 |
| Locusts in Ireland? A problem in the Welsh and Frankish annals DE Thornton Cambrian Medieval Celtic Studies, 37-54, 1996 | 10 | 1996 |
| Communities and kinship DE Thornton A Companion to the Early Middle Ages: Britain and Ireland, c. 500–c. 1100 …, 2009 | 8 | 2009 |
| A neglected genealogy of Llywelyn ap Gruffudd DE Thornton Cambridge Medieval Celtic Studies 23, 9-23, 1992 | 8 | 1992 |
| How Useful are Episcopal Ordination Lists as a Source for Medieval English Monastic History? DE Thornton The Journal of Ecclesiastical History 69 (3), 493-530, 2018 | 7 | 2018 |
| Who was rhain the Irishman? DE Thornton Studia Celtica 34, 131-48, 2000 | 7 | 2000 |
| Identifying celts in the past: A methodology DE Thornton Historical Methods: A Journal of Quantitative and Interdisciplinary History …, 2002 | 5 | 2002 |
| The death of Hywel Dda: A note DE Thornton Welsh History Review 20 (4), 743-749, 2001 | 5 | 2001 |
| Kings, chronicles and genealogies: Reconstructing mediaeval Celtic dynasties DE Thornton Family trees and the roots of politics, 23-40, 1997 | 5 | 1997 |
| Computerizing Celtic Kings and Clerics: Towards a Prosopography of Early Medieval Ireland DE Thornton History and Computing 12 (1), 31-41, 2000 | 4 | 2000 |
| COEL and the Computer: Towards a Prosopographical Key to Anglo-Norman Documents, 1066-1166 KSB Keats-Rohan, DE Thornton Medieval Prosopography 17 (1), 223-262, 1996 | 4 | 1996 |
| Power, politics, status: aspects of genealogy in mediaeval Ireland and Wales DE Thornton | 4 | 1991 |
