(complete list) – Constantine II (III), King (900–943) Malcolm I, King (943–954) Indulf, King (954–962) Dub, King (962–967) Cuilén, King (967–971) Kenneth II, King (971–995) Amlaíb, rival King (973–977) Constantine III (IV), King (995–997) Kenneth III, King (997–1005) Kingdom of Strathclyde (complete list) – Dyfnwal (died 908×915) Owain ap Dyfnwal (fl. 934) Dyfnwal ab Owain (died 975) Rhydderch ap Dyfnwal (fl. 971), possible King Máel Coluim (died 997) Owain ap Dyfnwal (died 1015), possible King Kingdom of the Isles (complete list) – Ragnall ua Ímair, King (c.914–921) to 921? Gebeachan, King (?–937) Maccus mac Arailt, King (fl.971–974) Gofraid mac Arailt, King (?–989) Gilli, Chieftain (990–?) Great Britain: Northumbria Kingdom of Northumbria (complete list) – Cnut, King (c.900) Æthelwold, King (900–902) Airdeconut, King (c.902) Eowils, co-King (902–910) Halfdan II, co-King (902–910) Ingwær, co-King (?–910) Ragnall ua Ímair, King (918–921) Sitric Cáech, King (921–927) Gofraid ua Ímair, King (927) Olaf Guthfrithson, King (939–941) Sitric II, King (c.942) Ragnall Guthfrithson, King (943–944) Eric Bloodaxe, King (947–948, 952–954) Amlaíb Cuarán, King (949–952) Great Britain: England The Britons (complete list) – Anarawd ap Rhodri, King (878–916) Idwal Foel, King (916–942) Hywel Dda, King (942–950) Dyfnwal ab Owain, King (962–975) Maredudd ab Owain, King (986–999) Kingdom of East Anglia (complete list) – Eohric, King (890–902) Æthelwold, Sub-King (902) Guthrum II, King (902–918) Mercia (complete list) – Æthelred II, Lord (c.881–911) Æthelflæd, Lady (911–918) Ælfwynn, Lady (918) Kingdom of Wessex / Kingdom of England (complete list) – Edward the Elder, King of Wessex (899–924) Ælfweard, King of Wessex (924) Æthelstan, King of the Anglo-Saxons (924–927), King of the English (927–939) Edmund I, King (939–946) Eadred, King (946–955) Eadwig, King (955–959) Edgar, King (959–975) Edward the Martyr, King (975–978) Æthelred the Unready, King (978–1013, 1014–1016) Great Britain: Wales Glywysing and Morgannwg (complete list) – Arthfael Hen ap Rhys, King of Glywysing (785–c.825) Rhys ap Arthfael, King of Glywysing (c.830–c.840) Hywel ap Rhys, King of Glywysing (c.840–886) Owain ap Hywel, King of Glywysing (886–c.930) Gruffydd ab Owain, King of Glywysing (c.930–934) Cadwgan ab Owain, King of Glywysing (c.930–950) Morgan Hen ab Owain, the Old, King of Morgannwg (c.942–974) Owain ap Morgan, King of Glywysing (974–c.983) Rhys ab Owain, King of Glywysing (c.990–c.1000) Ithel the Black, King of Glywysing (990) Iestyn ab Owain, King of Glywysing (c.990–c.1015) Kingdom of Gwynedd (complete list) – Anarawd ap Rhodri, King (878–916) Idwal Foel, King (916–942) Hywel Dda, King (942–950) Iago ab Idwal, King