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Kings of Gwynedd

Cunedda Wledig ap Edern “Cunedda the Imperator” c.450–c.460
Einion Yrth ap Cunedda “Einion the Impetuous” c.470–c.480
Owain Ddantgwyn Rhos; late 5th century
Cynlas Goch Rhos & St Einion Llŷn ap Owain late 5th and early 6th century
Cadwallon Lawhir ap Einion “Cadwallon Long Hand” c.500–c.534
Maelgwn Hir ap Cadwallon “Maelgwn the Tall” c.520–c.547
Rhun Hir ap Maelgwn “Rhun the Tall” c.547–c.580
Beli ap Rhun c.580–c.599
Iago ap Beli c.599–c.616
Cadfan ap Iago c.613–c.625
Cadwallon ap Cadfan c.625–634
Cadafael Cadomedd ap Cynfeddw “Cadfael the Battle-Shirker” 634–c.655
Cadwaladr Fendigaid ap Cadwallon “Cadwallader the Blessed” c.655–c.682
Idwal Iwrch ap Cadwaladr “Idwal Roebuck” c.682–c.720
Rhodri Molwynog ap Idwal “Rhodri the Bald and Gray” c.720–c.754
Caradog ap Meirion c.754–c.798
Cynan Dindaethwy ap Rhodri c.798–816
Hywel ap Rhodri Molwynog 814–825
Merfyn Frych ap Gwriad “Merfyn the Freckled” 825–844
Rhodri Mawr ap Merfyn “Rhodri the Great” 844–878
Anarawd ap Rhodri 878–916 establishes the Aberffraw dynasty, the senior branch of descendants from Rhodri Mawr
Idwal Foel ab Anarawd “Idwal the Bald” 916–942
Hywel Dda ap Cadell “Howell the Good” 942–950 Dinefwr dynasty of Rhodri Mawr's descendants usurp from Aberffraw.
Iago ab Idwal 950–979 returns to the Aberffraw branch
Ieuaf ab Idwal 950–969
Hywel ab Ieuaf 974–985
Cadwallon ab Ieuaf 985–986 Maredudd ab Owain 986–999 Dinefwr dynasty seizes Gwynedd
Cynan ap Hywel 999–1005 Returns to the Aberffraw dynasty briefly
Aeddan ap Blegywryd 1005–1018 usurpes Gwynedd from the Aberffraw dynasty
Llywelyn ap Seisyll 1018–1023 cadet branch of Mathrafal dynasty from Powys usurps from Aeddan ap Blegywryd
Iago ab Idwal ap Meurig 1023–1039 Aberffraw dynasty returns
Gruffydd ap Llywelyn 1039–1063 Llywelyn's son Gruffydd usurps from Aberffraw dynasty
Bleddyn ap Cynfyn 1063–1075 Mathrafal dynasty of Powys “receives” Gwynedd from the English King
Trahaearn ap Caradog 1075–1081
Gruffudd ap Cynan 1081–1137 Aberffraw dynasty returns

Prince of the Welsh
Owain Gwynedd ap Gruffydd 1137–1170 first to style himself Princeps Wallensium

Princes of Aberffraw & Lords of Snowdon Maelgwn ab Owain Gwynedd 1170–1173
Dafydd ab Owain Gwynedd 1170–1195 in the east
Rhodri ab Owain Gwynedd 1170–1190 in the west
Llywelyn Fawr ap Iorwerth “Llywelyn the Great” 1195–1240
Dafydd ap Llywelyn 1240–1246 Used title Prince of Wales from 1244 onwards
Owain Goch ap Gruffydd “Owen the Red” 1246–1255
Llywelyn ap Gruffudd “Llywelyn the Last” 1246–1282 Used title Prince of Wales from 1258 onwards
Dafydd ap Gruffydd 1282–1283 not crowned but claimed the title
Madog ap Llywelyn 1294–1295 not crowned but claimed the title
Owain ap Tomas ap Rhodri “Owen the Red Hand” 1372–1378 in exile but claimed the title

Ceredigion, Seisyllwg and Dyfed

Ceredigion
Ceredig ap Cunedda 424–453
Usai 453–490
Serwyl 490–525
Boddw 525–560
Arthfoddw 560–595
Arthlwys 595–630
Clydog I 630–665

Dyfed
Anwn c.357
Ednyfed c.373
Clotri c.405
Triffyn Farfog c.385
Aergol Lawhir to c.515
Vortiporius c.540
Arthur son of Pedr c.585
Cloten c.630 married Ceindrech of Brycheiniog, uniting the two kingdoms
Rhain ap Cadwgan c.690-740 also king of Brycheiniog; on his death, his kingdoms were divided again by his sons
Tewdwr ap Rhain c.710
Maredudd ap Tewdwr c.740–797
Rhain ap Maredudd c.797–808
Owain ap Maredudd c.808–811
Triffyn ap Rhain to c.814
Hyfaidd born c.830,[4] ruled ?-893
Llywarch ap Hyfaidd c.893-904
Rhodri ap Hyfaidd c.904-905
Hywel Dda “Hywel the Good” c.905-909

Seisyllwg
Seisyll, Prince of Ceredigion; eponym and possibly founder of Seisyllg
Arthen to 807
Dyfnwallon
Meurig of Seisyllwg
Gwgon of Seisyllwg to 872

House Manaw
Angharad and Rhodri the Great stewards; 872–878
Cadell ap Rhodri, second son of Anghared and Rhodri 878–909
Hywel Dda “Hywel the Good” 909-920, when he merged Seisyll and Dyfed into Deheubarth

Deheubarth
Hywel Dda Hywel the Good 920–950
His son, Owain ap Hywel 950–986
Rhodri ap Hywel 950–953
Edwin ap Hywel 950–954
Owain ap Hywel's son, Maredudd ab Owain 986–999
Cynan ap Hywel, prince of Gwynedd 999–1005
Maredudd ab Owain's son, Edwin ab Einion 1005–1018 who co-ruled with his brother,
Cadell ab Einion 1005–1018
Llywellyn ap Seisyll, prince of Gwynedd 1018–1023
Rhydderch ap Iestyn, prince of Glywysing 1023–1033
Edwin ab Einion's son, Hywel ab Edwin 1033–1044
Rhydderch ap Iestyn's son, Gruffydd ap Rhydderch 1047–1055
Gruffydd ap Llywelyn, prince of Gwynedd 1055–1063
Edwin ab Einion's grandson, Maredudd ab Owain ab Edwin 1063–1072
his brother, Rhys ab Owain 1072–1078
his second cousin, Rhys ap Tewdwr 1078–1093

Deheubarth was in the possession of the Normans from 1093 to 1155

Gruffydd ap Rhys 1116–1137 ruled a portion of Deheubarth with Norman permission
his son, Anarawd ap Gruffydd 1136–1143
his brother, Cadell ap Gruffydd 1143–1151
his brother, Maredudd ap Gruffydd 1151–1155
his brother, The Lord Rhys Rhys ap Gruffydd 1155–1197
his son, Gruffydd ap Rhys 1197–1201 who for a time ruled jointly with his brother,
Maelgwn ap Rhys 1199–1230 who disputed the territory with his brother
Rhys the Hoarse Rhys Gryg 1216–1234
From 1234 to 1283, Deheubarth was subject to the princes of Gwynedd

Rhys the Hoarse's son, Rhys Mechyll 1234–1244 ruled a portion of Deheubarth
his brother, Maredudd ap Rhys 1244–1271 ruled a portion of Deheubarth
his son, Rhys ap Maredudd 1271–1283 ruled a portion of Deheubarth

NOTE: saved from online sources as a starting outline only.