Seisyllwg (Welsh: [sɛiˈsəɬʊɡ]) was a petty kingdom of medieval Wales. It is unclear when it emerged as a distinct unit, but according to later sources...

Deheubarth was united around 920 by Hywel Dda out of the territories of Seisyllwg and Dyfed, which had come into his possession. Later on, the Kingdom of...

and eventually came to rule most of Wales. He became the sole king of Seisyllwg in 920 and shortly thereafter established Deheubarth, and proceeded to...

most important being Gwynedd, Powys, Deheubarth (originally Ceredigion, Seisyllwg and Dyfed) and Morgannwg (Glywysing and Gwent). Boundary changes and the...

of Wales) Seisyllwg, a petty kingdom from 680 to 920, comprising Ceredigion and Ystrad Tywi. In 871, Princess Angharad inherited Seisyllwg, and her husband...

Dyfed Ergyng Glywysing Gwent Gwynedd Morgannwg Powys Rhwng Gwy a Hafren Seisyllwg Dumnonia Ancient Cornwall (legendary) Dukes Mann Mann & the Isles Mann...

Deheubarth out of his maternal and paternal inheritances of Dyfed and Seisyllwg in 930, ousted the Aberffraw dynasty from Gwynedd and Powys and then codified...

Merfyn. Angharad was the daughter of Meurig, who was evidently the King of Seisyllwg in southwestern Wales. She was a descendant of Cunedda through his son...

Cadell ap Rhodri (854–909) was King of Seisyllwg, a minor kingdom in southwestern Wales, from about 872 until his death. Cadell was the second son of...

 870/871) was a 9th-century king of Ceredigion and Ystrad Tywi (i.e., Seisyllwg) in southwest Wales. Gwgon was the son of the former king Meurig ap Dyfnwallon...

territory and was fought over by the various kings of Dyfed, Deheubarth, Seisyllwg, Gwynedd, Morgannwg and the Normans. At the start of the 8th century Ystrad...

Gwynedd Medieval history Cultural history Morgannwg Powys Wenwynwyn Fadog Seisyllwg Rulers King of the Britons Royal houses List of rulers of Gwynedd Fifteen...

reconquest of Seisyllwg (Wales). He is successful, and his brother Cadell is finally able to take his rightful place on the Seisyllwg throne. Autumn...

Dyfed. The Dinefwr dynasty under King Hywel Dda would unite Dyfed and Seisyllwg into the Kingdom of Deheubarth in the early 10th century. During his reign...

(including Clwyd and Anglesey), Powys, Deheubarth (originally Ceredigion, Seisyllwg and Dyfed), Gwent, and Morgannwg (Glamorgan). These Brittonic-Welsh kingdoms...

Brochfael ap Elisedd, King (c.755–773) Cadell ap Brochfael, King (773–808) Seisyllwg – Arthen ap Seisyll, King (700–735) Dyfnwal ap Arthwyr [br], King (735–770)...

from his mother Nest and he added Seisyllwg (Ceredigion and Ystrad Tywi) by a dynastic marriage to Angharad of Seisyllwg. Rhodri divided Wales into at least...

divide their spoils. King Rhodri Mawr ("the Great") of Gwynedd annexes Seisyllwg, uniting most of Wales under his rule (approximate date). Tønsberg, the...

(893–904) Rhodri ap Hyfaidd, King (904–905) Hywel Dda, King (905–909) Seisyllwg (complete list) – Cadell ap Rhodri (878–909) Deheubarth (complete list)...

(825–844) Rhodri the Great, King (844–878) Anarawd ap Rhodri, King (878–916) Seisyllwg – Meurig ap Dyfnwal [br], King (770–807) Gwgon ap Meurig, King (808–872)...

begin extensive military campaigns to quell resistance in Powys and Seisyllwg (approximate date). Zanj Rebellion: Abbasid general Al-Muwaffaq lays siege...

Unlocking Our Sound Heritage project at the National Library of Wales. Seisyllwg List of Lord Lieutenants of Cardiganshire List of Custodes Rotulorum of...

Gwynedd Medieval history Cultural history Morgannwg Powys Wenwynwyn Fadog Seisyllwg Rulers King of the Britons Royal houses List of rulers of Gwynedd Fifteen...

throne was usurped by Hywel, under whom the kingdom then merged with Seisyllwg to form Deheubarth. Ashley, Mike (27 March 2014). A Brief History of British...

(820—878), Welsh king of Gwynedd (844—878), king of Powys (855—878), king of Seisyllwg (872—878) Rhodri ap Hyfaidd (845—905), Welsh king of Dyfed (904—905) Rhodri...

as his heiress. Elen was married to Hywel Dda, ruler of neighbouring Seisyllwg and grandson of Rhodri the Great through his second son, Cadell ap Rhodri...

(Welsh: Rhodri Fawr) 844–878 Gwynedd, from 855 also Powys, from 872 also Seisyllwg King of the Britons (in 878) "began to reign over the Welsh" (843 AD)...

Asser, bishop of Sherborne (approximate date) Cadell ap Rhodri, king of Seisyllwg (Wales) Cerball mac Muirecáin, king of Leinster (Ireland) Fujiwara no...

Eanbert. Al-Mu'tadid, Muslim caliph (or 861) Cadell ap Rhodri, king of Seisyllwg (d. 909) Cui Yin, chancellor of the Tang Dynasty (d. 904) Theobald the...

and kills Ubba in battle. King Rhodri the Great of Gwynedd, Powys and Seisyllwg, returns to his kingdoms, but is killed fighting the Mercians of King...