The 1022-1072 period in Ireland, between the death of Máel Sechnaill mac Domnaill and the accession of Toirdhealbhach Ua Briain, is sometimes regarded as an interregnum, as the High Kingship of Ireland is disputed throughout these decades.

The interregnum may even have extended to 1121, when Toirdhealbhach Ua Conchobhair accedet to the title.