(950–979) Ieuaf ab Idwal, King (950–969) Hywel ab Ieuaf, King (974–985) Cadwallon ab Ieuaf, King (985–986) Maredudd ab Owain, King (986–999) Cynan ap Hywel, King (999–1005) Gwent (complete list) – Brochfael ap Meurig, King (880–920) Arthfael ap Hywel, King (?–916/927) Owain ap Hywel, King (920–930) Gruffydd ab Owain, King (?–c.935) Cadwgan ab Owain, King (?–951) Nowy ap Gwriad, King (c.950–c.970) Arthfael ap Nowy, King (c.970–983) Rhodri ap Elisedd and Gruffydd ap Elisedd, co-Kings (983–c.1015) Kingdom of Powys (complete list) – Llywelyn ap Merfyn, King (900–942) Hywel Dda, King (942–950) Owain ap Hywel Dda, King (950–986) Maredudd ap Owain, King (986–999) Llywelyn ap Seisyll, King (999–1023) Kingdom of Dyfed (complete list) – Llywarch ap Hyfaidd, King (893–904) Rhodri ap Hyfaidd, King (904–905) Hywel Dda, King (905–909) Seisyllwg (complete list) – Cadell ap Rhodri (878–909) Deheubarth (complete list) – Hywel Dda, King (920–950) Owain ap Hywel, King (950–986) Rhodri ap Hywel, King (950–953) Edwin ap Hywel, King (950–954) Maredudd ab Owain, King (986–999) Cynan ap Hywel, prince of Gwynedd (999–1005) Hywel ab Owain, King (c.990–c.1043) Ireland Ireland (complete list) – Flann Sinna, High King (877–914) Niall Glúndub, High King (915–917) Donnchad Donn, High King (918–942) Congalach Cnogba, High King ( 943–954) Domnall ua Néill, High King (955–978) Máel Sechnaill mac Domnaill, High King (979–1002, 1014–1022) Kingdom of Ailech (complete list) – Domnall mac Áeda, King (887–915) Niall Glúndub mac Áeda, King (896–919) Flaithbertach mac Domnaill, King (916–919) Fergal mac Domnaill, King (919–938) Muirchertach mac Néill, King (938–943) Domnall mac Muirchertaig ua Néill, King (943–980) Flaithbertach mac Muirchertaig meic Néill, King (943–949) Flaithbertach mac Conchobair, King (956–962) Tadg mac Conchobair, King (956–962) Conn mac Conchobair, King (956–962) Murchad Glun re Lar mac Flaithbertaigh, King (962–972) Fergal mac Domnaill meic Conaing, King (980–989) Áed mac Domnaill Ua Néill, King (989–1004) Airgíalla (complete list) – Maol Craoibh ua Duibh Sionach, King (?–917) Fogarthach mac Donnegan, King (?–947) Egneach mac Dalach, King (?–961) Donnacan mac Maelmuire, King (?–970) Mac Eiccnigh mac Dalagh, King (?–998) Mac Leiginn mac Cerbaill, King (?–1022) Kingdom of Breifne (complete list) – Flann mac Tighearnáin, Lord (c.910) Cernachan mac Tighearnáin, King (?–931) Conghalach mac Cathaláin, Lord (c.935) Cléircén son of Tigernán, King (c.937) Fergal ua Ruairc, King (?) (Sean) Fergal Ó Ruairc, King (c.964–967) Niall Ó Ruairc, heir (1000–1001) Connachta (complete list) – Cathal mac Conchobair, King (900–925) Tadg mac Cathail, King (925–956) Fergal Ua Ruairc, King (956–967) Conchobar mac Tadg, King