House of Gwertherion
Gwrtheyrn High-King Vortigern
Cadeyern Fendigaid c.430 – 447 Reputed eldest son of Gwrtheyrn, blessed by Saint Germanus
Cadell Ddyrnllwg c.447 – 460
Rhyddfedd Frych c.480
Cyngen Glodrydd c.500
Pasgen ap Cyngen c.530
Morgan ap Pasgen c.540
Brochwel Ysgithrog c.550
Cynan Garwyn ?–610
Selyf ap Cynan 610–613
Manwgan ap Selyf 613
Eiludd Powys 613–?
Beli ap Eiludd vers 655
Gwylog ap Beli 695?–725
Elisedd ap Gwylog 725–755?
Brochfael ap Elisedd 755?–773
Cadell ap Brochfael 773–808
Cyngen ap Cadell 808–854 - Throne usurped by Gwynedd and exiled to Rome where the family endured

House of Manaw
Rhodri Mawr 854–878 of Gwynedd, inheriting through his mother
Merfyn ap Rhodri 878–900 House Aberffraw
Llywelyn ap Merfyn 900–942 House Aberffraw
Hywel Dda 942–950 House Dinefwr usurped from the Aberffraw line of Manaw
Owain ap Hywel 950–986 Ruled thereafter by a cadet branch of the House of Dinefwr, establishing the Mathrafal dynasty of rulers
Maredudd ap Owain 986–999
Llywelyn ap Seisyll 999–1023, husband of Angharad, the daughter of Maredudd ab Owain
Rhydderch ap Iestyn 1023–1033
Iago ap Idwal 1033–1039
Gruffydd ap Llywelyn 1039–1063

Mathrafal Princes of Powys
Bleddyn ap Cynfyn 1063–1075
Iorwerth ap Bleddyn 1075–1103 part
Cadwgan ap Bleddyn 1075–1111 part
Owain ap Cadwgan 1111–1116 part
Maredudd ap Bleddyn 1116–1132
Madog ap Maredudd 1132–1160

From 1160 Powys was split into two parts. The southern part was later called Powys Wenwynwyn after Gwenwynwyn ab Owain “Cyfeiliog” ap Madog, while the northern part was called Powys Fadog after Madog ap Gruffydd “Maelor” ap Madog

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