Around 1222 Matilda Angus 6th Countess Angus was born to Maol Choluim Angus 5th Earl Angus [aged 32].
In 1242 [her father] Maol Choluim Angus 5th Earl Angus [aged 52] died. His daughter Matilda [aged 20] succeeded 6th Countess Angus.
In 1245 [her son] Gilbert Umfraville 7th Earl Angus was born to Gilbert Umfraville [aged 50] and Matilda Angus 6th Countess Angus [aged 23]. He married before 1277 his fourth cousin Elisabetha Comyn, daughter of Alexander Comyn 2nd Earl Buchan and Elizabeth Quincy Countess Buchan, and had issue.
Before 12th December 1247 Richard de Dover Plantagenet [aged 27] and Matilda Angus 6th Countess Angus [aged 25] were married. She the daughter of Maol Choluim Angus 5th Earl Angus. They were fourth cousins. He a grandson of King John of England.
In 1261 Matilda Angus 6th Countess Angus [aged 39] died. Her son Gilbert [aged 16] succeeded 7th Earl Angus.
On 9th August 1270 [her former husband] Richard de Dover Plantagenet [aged 50] died in Carthage.
Gilbert Umfraville and Matilda Angus 6th Countess Angus were married. The difference in their ages was 27 years. She the daughter of Maol Choluim Angus 5th Earl Angus.
John Comyn Earl Angus and Matilda Angus 6th Countess Angus were married. She the daughter of Maol Choluim Angus 5th Earl Angus. He the son of William Comyn Earl Buchan and Sarah Fitzhugh.
[her daughter] Isabel Plantagenet Countess of Atholl was born to Richard de Dover Plantagenet and Matilda Angus 6th Countess Angus. She a great granddaughter of King John of England. She married before June 1266 David Strathbogie 8th Earl Atholl and had issue.
[her son] Richard Plantagenet was born to Richard de Dover Plantagenet and Matilda Angus 6th Countess Angus. He a great grandson of King John of England.
Kings Wessex: Great x 6 Grand Daughter of King Edmund "Ironside" I of England
Kings Scotland: Great x 3 Grand Daughter of King David I of Scotland
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 1 Grandfather: Gille Críst Angus 4th Earl Angus
Grandfather: Donnchad Angus 5th Earl Angus Great Grandson of King David I of Scotland
Great x 4 Grandfather: King Malcolm III of Scotland 
son of King Duncan I of Scotland
Great x 3 Grandfather: King David I of Scotland son of King Malcolm III of Scotland
Great x 4 Grandmother: Margaret Wessex Queen Consort Scotland Granddaughter of King Edmund "Ironside" I of England
Great x 2 Grandfather: Henry Dunkeld 3rd Earl Huntingdon 1st Earl of Northumbria son of King David I of Scotland
Great x 4 Grandfather: Waltheof Northumbria 1st Earl of Northampton 1st Earl Huntingdon
Great x 3 Grandmother: Maud Queen Consort Scotland 6 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 4 Grandmother: Judith Flanders Countess Huntingdon 5 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 1 Grandmother: Marjorie Dunkeld Countess Angus Granddaughter of King David I of Scotland
Great x 4 Grandfather: William Warenne 1st Earl of Surrey 
Great x 3 Grandfather: William Warenne 2nd Earl of Surrey
Great x 4 Grandmother: Gundred Countess of Surrey
Great x 2 Grandmother: Ada Warenne Countess Huntingdon and Northumbria 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
father: Maol Choluim Angus 5th Earl Angus 2 x Great Grandson of King David I of Scotland
Matilda Angus 6th Countess Angus 3 x Great Granddaughter of King David I of Scotland