Paternal Family Tree: Braose
Maternal Family Tree: Aoife ni Diarmait Macmurrough Countess Pembroke and Buckingham 1145-1188
Before 1221 [her father] William de Braose 9th Baron Abergavenny 7th Baron Bramber [aged 16] and [her mother] Eva Marshal [aged 17] were married. She the daughter of [her grandfather] William Marshal 1st Earl Pembroke and [her grandmother] Isabel Clare Countess Pembroke.
Around 1222 Isabella "Lady of Snowdon" Braose Princess Wales was born to William de Braose 9th Baron Abergavenny 7th Baron Bramber [aged 18] and Eva Marshal [aged 19].
In June 1228 [her grandfather] Reginald de Braose 8th Baron Abergavenny 6th Baron Bramber died at Brecon [Map]. His son [her father] William [aged 24] succeeded 9th Baron Abergavenny Feudal Creation, 7th Baron Bramber Feudal.
In 1230 Dafydd ap Llewellyn Prince of Wales [aged 17] and Isabella "Lady of Snowdon" Braose Princess Wales [aged 8] were married. She the daughter of William de Braose 9th Baron Abergavenny 7th Baron Bramber [aged 26] and Eva Marshal [aged 27]. They were half fourth cousins. He a grandson of King John of England.
On 2nd May 1230 [her father] William de Braose 9th Baron Abergavenny 7th Baron Bramber [aged 26] was hanged by [her father-in-law] Llewellyn "The Great" Aberffraw [aged 58] for having been found in the bedchamber of his wife [her mother-in-law] Joan Plantagenet [aged 39]. His daughter [her sister] Eva [aged 3] succeeded 10th Baroness Abergavenny Feudal Creation. William Cantilupe by marriage Baron Abergavenny Feudal Creation. His first cousin John [aged 33] succeeded 8th Baron Bramber Feudal.
On 6th June 1237 John Dunkeld 9th Earl Huntingdon 7th Earl Chester 8th Earl Northampton [aged 30] died. Matthew Paris suggests he was poisoned by his wife [her sister-in-law] Elen ferch Llewellyn Aberffraw Countess Huntingdon and Mar [aged 19]. Earl Huntingdon, Earl of Northampton extinct. Earl Chester merged with the Crown.
In 1240 [her husband] Dafydd ap Llewellyn Prince of Wales [aged 27] was created Prince of Wales. Isabella "Lady of Snowdon" Braose Princess Wales [aged 18] by marriage Princess of Wales.
In 1246 [her mother] Eva Marshal [aged 43] died.
On 25th February 1246 [her husband] Dafydd ap Llewellyn Prince of Wales [aged 33] died at Abergwyngregyn Bangor.
Abbot John Whethamstede’s Chronicle of the Abbey of St Albans
Abbot John Whethamstede's Register aka Chronicle of his second term at the Abbey of St Albans, 1451-1461, is a remarkable text that describes his first-hand experience of the beginning of the Wars of the Roses including the First and Second Battles of St Albans, 1455 and 1461, respectively, their cause, and their consequences, not least on the Abbey itself. His text also includes Loveday, Blore Heath, Northampton, the Act of Accord, Wakefield, and Towton, and ends with the Coronation of King Edward IV. In addition to the events of the Wars of the Roses, Abbot John, or his scribes who wrote the Chronicle, include details in the life of the Abbey such as charters, letters, land exchanges, visits by legates, and disputes, which provide a rich insight into the day-to-day life of the Abbey, and the challenges faced by its Abbot.
Available at Amazon in eBook and Paperback format.
Around 1248 Isabella "Lady of Snowdon" Braose Princess Wales [aged 26] died. She was buried at Godstow Abbey [Map].
Kings Gwynedd: Great x 8 Grand Daughter of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Kings Seisyllwg: Great x 10 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 8 Grand Daughter of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Kings France: Great x 7 Grand Daughter of Hugh I King of the Franks
Kings Duke Aquitaine: Great x 11 Grand Daughter of Ranulf I Duke Aquitaine
Great x 4 Grandfather: William de Braose 1st Baron Bramber 
Great x 3 Grandfather: Phillip de Braose 2nd Baron Bramber
Great x 2 Grandfather: William de Braose 3rd Baron Bramber
Great x 4 Grandfather: Juhel Totnes
Great x 3 Grandmother: Aenor Totnes Baroness Bramber
Great x 1 Grandfather: William de Braose 4th Baron Bramber 5 x Great Grandson of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Great x 4 Grandfather: Walter Gloucester
Great x 3 Grandfather: Miles Gloucester 1st Earl Hereford
Great x 4 Grandmother: Emme or Bertha Balun
Great x 2 Grandmother: Bertha Gloucester Baroness Bramber 4 x Great Granddaughter of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Great x 4 Grandfather: Bernard Neufmarché
Great x 3 Grandmother: Sibyl Neufmarché Countess Hereford 3 x Great Granddaughter of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Great x 4 Grandmother: Agnes or Nest St John 
2 x Great Granddaughter of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Grandfather: Reginald de Braose 8th Baron Abergavenny 6th Baron Bramber 6 x Great Grandson of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Great x 3 Grandfather: Reginald St Valery
Great x 2 Grandfather: Bernard St Valery
Great x 1 Grandmother: Maud "Lady of Hay" St Valery Baroness Bramber
Great x 2 Grandmother: Matilda Unknown
father: William de Braose 9th Baron Abergavenny 7th Baron Bramber 7 x Great Grandson of Maredudd ab Owain King Deheubarth King Powys King Gwynedd
Grandmother: Graecia Briwere
Isabella "Lady of Snowdon" Braose Princess Wales 7 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandfather: Gilbert Giffard 
Great x 1 Grandfather: John Fitzgilbert
Grandfather: William Marshal 1st Earl Pembroke
Great x 3 Grandfather: Edward of Salisbury 1st Baron Trowbridge 1st Baron Chitterne
Great x 2 Grandfather: Walter of Salisbury 2nd Baron Chitterne
Great x 1 Grandmother: Sybil of Salisbury
Great x 2 Grandmother: Sybilla Chaworth Baroness Chitterne 
mother: Eva Marshal 6 x Great Granddaughter of Hugh I King of the Franks
Great x 4 Grandfather: Richard de Clare 
Great x 3 Grandfather: Gilbert de Clare
Great x 4 Grandmother: Rohese Giffard 
Great x 2 Grandfather: Gilbert de Clare 1st Earl Pembroke
Great x 4 Grandfather: Hugh Clermont Count of Clermont-en-Beauvaisis
Great x 3 Grandmother: Adeliza Clermont
Great x 1 Grandfather: Richard "Strongbow" Clare 2nd Earl Pembroke 4 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandfather: Roger "Bearded" Beaumont 
Great x 3 Grandfather: Robert Beaumont 1st Earl of Leicester Count Meulan
Great x 4 Grandmother: Adeline of Meulan
Great x 2 Grandmother: Isabel Beaumont Countess Pembroke 3 x Great Granddaughter of Hugh I King of the Franks
Great x 4 Grandfather: Hugh "Great" Capet 
Great Grandson of Hugh I King of the Franks
Great x 3 Grandmother: Elizabeth Capet Countess Leicester, Meulan and Surrey 2 x Great Granddaughter of Hugh I King of the Franks
Great x 4 Grandmother: Adelaide I Countess Vermandois 8 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Grandmother: Isabel Clare Countess Pembroke 5 x Great Granddaughter of Hugh I King of the Franks
Great x 2 Grandfather: Diarmait Macmurrough
Great x 1 Grandmother: Aoife ni Diarmait Macmurrough Countess Pembroke and Buckingham