Detsembris 1922 lõi enamik Iirimaast Suurbritanniast lahku ja rajati Iiri Vaba Riik. Uus Põhja-Iirimaa ehk suur osa Ulsteri provintsist jäi Ühendkuningriigi koosseisu. Vaba Riik oli Briti impeeriumidominioon ning seal jäi de jure võimule Briti monarh. Aastal 1927 sai Suurbritannia ja Iirimaa Ühendkuningriigist ametlikult Suurbritannia ja Põhja-Iirimaa Ühendkuningriik. Aastal 1937 võttis Iirimaa vastu uue põhiseaduse, kust eemaldati kõik viited monarhiale. Aprillis 1949 kuulutati Iiri Vaba Riigi asemel välja Iirimaa Vabariik, mis lahkus Rahvaste Ühendusest.
Rí Éirenn, Rí Alban, kingship and identity in the night and tenth centuries, Maire Herbert, in Kings clerics and chronicles in Scotland, pp.62–72, ed. S. Taylor, Dublin, 2000
Dal Cais, church and dynasty, Donnachadh O Corrain, Eiru 24, 1973, pp.1–69
Nationality and kingship in pre-Norman Ireland, Donnchadh O Corrain, in Nationality and the pursuit of national independence, pp.1–35, Historical Studies 11, ed. T.W. Moody, Belfast, 1978
The Irish royal sites in history and archaeology, B. Wailes, CMCS 3, 1982, pp.1–29.
A New History of Ireland vol. ix:maps, genealogies, lists:a companion to Irish history part II., edited T.W. Moody, F.X. Martin, F.J. Byrne, Oxford, 1984.
The archaeology of early Irish kingship, Richard B. Warner, in Power and Politics in Early Medieval Britain and Ireland, pp.47–68, ed. S.T. Driscoll and M.R. Nieke, Edinburgh, 1988
From Kings to Warlords:The Changing Political Structure of Gaelic Ireland in the Later Middle Ages, Katharine Simms, Dublin, 1987.
The King as Judge in early Ireland, Marilyn Gerriets, CMCS 13 (1987), pp.39–72.
High Kingship and Tiberius Claudius Cogidubnus, A.T. Fear, in EtC 30 (1994), pp.165–68.
Kingship, society and sacrality:rank, power and ideology in early medieval Ireland, N.B. Aitchison, in Traditio 49 (1994), pp.45–47.
Kings and kingship in Early Medieval Ireland, pp.63–84, Daibhi O Croinin, 1995.
Kings over overkings. Propaganda for pre-eminence in early medieval Ireland, Bart Jaski, in The Propagation of Power in the Medieval West, ed. M. Gosman, A. Vanderjagt, J. Veenstra, pp.163–76, Groningen, 1996.
An inaugural ode to Hugh O'Connor (King of Connacht 1293–1309), Seam Mac Mathuna, ZCP 49–50, 1997, pp.26–62.
The inauguration of Tairrdelbach Ua Conchobair at Ath an Termoinn, Elizabeth FitzPatrick, Peritia 12 (1998), pp.351–358.
Kings, the kingship of Leinster and the regnal poems of "laidshenchas Laigen:a reflection of dynastic politics in leinster, 650–1150, Edel Bhreathnach, in Seanchas:Studies in Early and Medieval Irish Archaeology, History and Literature in Honour of Francis John Byrne, Four Courts Press, Dublin, 2000.
The Conntinuation of Bede, s.a. 750; high-kings, kings of Tara and Bretwaldas, T.M. Charles-Edwards, pp. 137–145, op.cit.
Early Irish Kingship and Succession, Bart Jaski, Dublin, 2000.
Leinster states and kings in Christian times pp. 33–52, The Ua Maelechlainn kings of Meath, pp. 90–107, Christian kings of Connacht, pp. 177–194, Paul Walsh, in Irish Leaders and Learning Through the Ages, ed. Nollaig O Muraile, 2003.