Llywelyn ap Seisyll (died 1023) was a king of Gwynedd in the 11th century who ruled over the Welsh kingdoms of Gwynedd, Powys and Deheubarth. Llywelyn...

of Gwynedd and Powys from 1039 to 1055. Gruffydd was the son of Llywelyn ap Seisyll, king of Gwynedd, and Angharad daughter of Maredudd ab Owain, king...

chronologically Llywelyn ap Merfyn (died 942), king of Powys Llywelyn Aurdorchog (c. 1005–1065) Welsh war-chief, lord of Ial. Llywelyn ap Seisyll (died 1023)...

the Anglo-Saxon name Werestan. Cynfyn, likely a supporter of King Llywelyn ap Seisyll, would after the latter's 1023 death marry the widowed queen, Angharad...

Aberffraw briefly. Aeddan ap Blegywryd (1005–1018) (minor commote lord usurps Gwynedd from the Aberffraw dynasty). Llywelyn ap Seisyll (1018–1023) (Rhuddlan...

as "King of the Britons" in the Annals of Ulster. On the death of Llywelyn ap Seisyll in 1023, the rule of Gwynedd returned to the House of Aberffraw with...

of king Llywelyn ap Seisyll, would later become the mother king Bleddyn ap Cynfyn, founder of the House of Mathrafal and Gruffydd ap Llywelyn, King of...

Owain, wife of Llywelyn ap Seisyll, King of Gwynedd and of Deheubarth Angharad ferch Rhys ap Gruffydd (1132–1197) Angharad ferch Gruffydd II ap Madog, Lord...

(999–1005) Aeddan ap Blegywryd, King (1005–1018) Llywelyn ap Seisyll, King (1018–1023) Iago ab Idwal ap Meurig, King (1023–1039) Gruffydd ap Llywelyn, King (1039–1063)...

the north and east: by Llywelyn ap Seisyll of Gwynedd in 1018; by Rhydderch ab Iestyn of Morgannwg in 1023; by Gruffydd ap Llywelyn of Gwynedd in 1041 and...

has been recorded about Rhydderch ab Iestyn in the annals. When Llywelyn ap Seisyll, king of Gwynedd and Deheubarth died unexpectedly in 1023, Rhydderch...

LLYWELYN ap IORWERTH (or 'Llywelyn the Great', often styled 'Llywelyn I', though in strictness the first prince of that name was Llywelyn ap Seisyll;...

Blegywryd (d. 1018) Llywelyn ap Seisyll (d. 1023) North and Mid to South West Wales. Rhodri Mawr (872–878) Cathen ap Gwlyddein (c. 625) Cadwgon ap Cathen (c. 650)...

a king of Ceredigion Seisyll ap Rhun (10th century) Seisyll ap Ednywain or Owain, father of King Llywelyn of Gwynedd Seisyll ap Dyfnwal (12th century)...

1018, Aeddan ap Blegywryd was challenged for leadership by Llywelyn ap Seisyll, whose ancestry is unknown. A battle took place and Aeddan ap Blegywryd was...

Manaw) Owain ap Hywel (950–986) (Mathrafal dynasty, cadet branch of the House of Dinefwr) Maredudd ap Owain (986–999) Llywelyn ap Seisyll (999–1023), husband...

his father Llywelyn ap Seisyll had held over South Wales. Davies, Michael; Davies, Sean (2012). The last King of Wales: Gruffudd ap Llywelyn, c. 1013 -...

four sons were defeated in battle by Llywelyn ap Seisyll, lord of Rhuddlan in lower Gwynedd. Llywelyn ap Seisyll married Anghared, daughter of Meredudd...

Biography. National Library of Wales. Pierce, Thomas Jones (1959). "Llywelyn Ap Seisyll (died 1023), king of Deheubarth and Gwynedd". Dictionary of Welsh...

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...

passed to his grandson Llywelyn ap Seisyll, through Maredudd's elder daughter Princess Anghared (with her first husband Seisyll ap Owian), while Deheubarth...

"LLYWELYN ap IORWERTH (or 'Llywelyn the Great'), often styled 'Llywelyn I', though in strictness the first prince of that name was Llywelyn ap Seisyll;...

through Rhodri's son, king Cadell ap Rhodri. The Senior line of the House of Aberffraw descended from Prince Llywelyn the Great in patrilineal succession...

was in conflict with Edgar, King of England Llywelyn ap Seisyll, King of the Britons, killed prince Aeddan ap Blegywryd, and was featured in Brut y Tywysogion...

of Iorwerth Drwyndwn grandfather and father respectively of Llywelyn ab Iorwerth. Seisyll also wrote poems in praise of the campaigns of the Lord Rhys...

Gwynedd and Powys King of the Britons (in 999) Brut y Tywysogion Llywelyn ap Seisyll 1018–1023 Gwynedd and Powys; from 1022 also Deheubarth King of the...

 346–347. Charles-Edwards 2013, p. 665. Pierce, Thomas Jones (1959). "Llywelyn ap Seisyll (died 1023), king of Deheubarth and Gwynedd". Dictionary of Welsh...

Wales. However, after his defeat at Abergwill and deposition by Llywelyn ap Seisyll of Gwynedd in 1022, he was recorded by the other histories of the...

intellectual (b. 923) Godfrey II, count and duke of Lower Lorraine (b. 965) Llywelyn ap Seisyll, king of Gwynedd and Powys Oda of Haldensleben, duchess of the Polans...

its people. 1005 Aeddan ap Blegywryd succeeds Cynan ab Hywel as Prince of Gwynedd. 1018 Llywelyn ap Seisyll defeats Aeddan ap Blegywryd in battle; Aeddan...