On 23 Jul 1423 [her father] Arnold Egmont 1st Duke Guelders (age 13) and [her mother] Catherine La Marck (age 6) were married. She the daughter of Adolph La Marck I Duke Cleves 1373-1448 (age 49) and Marie Valois Duchess Cleves (age 30). She a great x 5 granddaughter of King Edward "Longshanks" I of England. 
Around 1434 Mary of Guelders Queen Consort Scotland was born to Arnold Egmont 1st Duke Guelders (age 23) and Catherine La Marck (age 16) at Grave.
On 21 Feb 1437 King James I of Scotland (age 42) was assassinated at Blackfriars. He was buried at Carthusian Charterhouse, Perth. His son [her future husband] King James II of Scotland (age 6) succeeded II King Scotland. His wife, Joan Beaufort Queen Consort Scotland (age 33), managed to escape.
On 12 Feb 1449 Sigismund Habsburg 4th Duke Austria 1427-1496 (age 21) and [her future sister-in-law] Eleanor Stewart Duchess Austria (age 16) were married at Merano. She by marriage Duchess Austria. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. He the son of Frederick "Empty Pockets" Habsburg 4th Duke Austria 1382-1439 and Anna of Brunswick-Wolfenbüttel Duchess Austria. She a great x 2 granddaughter of King Edward III of England.
On 03 Jul 1449 King James II of Scotland (age 18) and Mary of Guelders Queen Consort Scotland (age 15) were married at Holyrood Abbey, Holyrood. He the son of King James I of Scotland and Joan Beaufort Queen Consort Scotland. He a great x 2 grandson of King Edward III of England.
On 03 Jul 1449 Mary of Guelders Queen Consort Scotland (age 15) was crowned Queen Consort Scotland.
On 19 May 1450 [her son] Unamed Stewart was born to [her husband] King James II of Scotland (age 19) and Mary of Guelders Queen Consort Scotland (age 16). He died the same day. He a great x 3 grandson of King Edward III of England.
On 10 Jul 1451 [her son] King James III of Scotland was born to [her husband] King James II of Scotland (age 20) and Mary of Guelders Queen Consort Scotland (age 17). He a great x 3 grandson of King Edward III of England.
On 13 May 1453 [her daughter] Mary Stewart Countess Arran was born to [her husband] King James II of Scotland (age 22) and Mary of Guelders Queen Consort Scotland (age 19) at Stirling Castle [Map]. She a great x 3 granddaughter of King Edward III of England.
Around 1454 [her son] Alexander Stewart 1st Duke Albany 1454-1485 was born to [her husband] King James II of Scotland (age 23) and Mary of Guelders Queen Consort Scotland (age 20). He a great x 3 grandson of King Edward III of England.
Around 1455 [her son] David Stewart was born to [her husband] King James II of Scotland (age 24) and Mary of Guelders Queen Consort Scotland (age 21). He a great x 3 grandson of King Edward III of England.
Around 1456 [her son] John Stewart 1st Earl Mar 1456-1479 was born to [her husband] King James II of Scotland (age 25) and Mary of Guelders Queen Consort Scotland (age 22). He a great x 3 grandson of King Edward III of England.
In 1458 George Gordon 2nd Earl Huntley (age 2) and [her sister-in-law] Anabella Stewart (age 22) were married. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. He the son of Alexander Gordon 1st Earl Huntley and Elizabeth Crichton Countess Huntley (age 47). She a great x 2 granddaughter of King Edward III of England.
On 15 May 1459 James Douglas 1st Earl Morton -1493 and [her sister-in-law] Joan Stewart Countess Morton (age 31) were married. She by marriage Countess Morton. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. They were first cousin once removed. She a great x 2 granddaughter of King Edward III of England.
Around 1460 [her daughter] Princess Margaret Stewart was born to [her husband] King James II of Scotland (age 29) and Mary of Guelders Queen Consort Scotland (age 26). She a great x 3 granddaughter of King Edward III of England.
On 03 Aug 1460 [her husband] King James II of Scotland (age 29) was killed accidentally when a cannon exploded and he was hit by debris. He was buried at Holyrood Abbey, Holyrood. His son [her son] King James III of Scotland (age 9) succeeded III King Scotland.
William Douglas 3rd Lord Drumlanrig (age 20) was present.
Around Jun 1463 a Scottish and Lancastrian force, including [her son] King James III of Scotland (age 11), his mother Mary of Guelders Queen Consort Scotland (age 29), King Henry VI of England and II of France (age 41) and his wife Margaret of Anjou Queen Consort England (age 33), laid siege to Norham Castle [Map]. They held Norham for eighteen days until a force led by Richard "Kingmaker" Neville Earl Warwick, 6th Earl Salisbury (age 34) and his brother John Neville 1st Marquess Montagu (age 32) advanced to Norham Castle [Map] at which time the Scottish and Lancastrian force fled in panic pursued by the Yorkist army. Margaret of Anjou Queen Consort England (age 33) and her son Edward of Westminster Prince of Wales (age 9) escaped to Berwick on Tweed [Map] and then to the continent. King Henry VI of England and II of France (age 41) remained in Scotland - he and his wife never saw each other again.
On 01 Dec 1463 Mary of Guelders Queen Consort Scotland (age 29) died at Roxburgh Castle, Roxburgh. She was buried at Holyrood Abbey, Holyrood.
Francis Montfort I Duke Brittany and Isabella Stewart Duchess Brittany were married. She by marriage Duchess Brittany. She the daughter of King James I of Scotland and Joan Beaufort Queen Consort Scotland. He a great x 4 grandson of King Henry III of England. She a great x 2 granddaughter of King Edward III of England.
Kings Wessex: Great x 13 Grand Daughter of King Edmund "Ironside" I of England
Kings England: Great x 6 Grand Daughter of King Edward "Longshanks" I of England
Kings Scotland: Great x 11 Grand Daughter of Malcolm III King Scotland
Kings Franks: Great x 8 Grand Daughter of Louis VII King Franks
Kings France: Great x 5 Grand Daughter of Philip V King France I King Navarre 1293-1322
Great x 2 Grandfather: John Egmont
Great x 1 Grandfather: Arnold Egmont
GrandFather: John Egmont
Father: Arnold Egmont 1st Duke Guelders
Mary of Guelders Queen Consort Scotland 1434-1463 6 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandfather: Adolph La Marck II Count La Marck -1347
Great x 1 Grandfather: Adolph La Marck 8 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Dietrich Cleves VII Count Cleves 1256-1305
Great x 3 Grandfather: Dietrich Cleves VIII Count Cleves 1291-1347
Great x 4 Grandmother: Margaret Kiburg Laufenburg Countess Cleves
Great x 2 Grandmother: Margaret Cleves Countess Mark 7 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandfather: Reginald I Count Guelders 5 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandmother: Margaret Guelders Countess Cleves 6 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandmother: Margaret Dampierre Duchess Brabant
5 x Great Grand Daughter of King William "Conqueror" I of England
GrandFather: Adolph La Marck I Duke Cleves 1373-1448 9 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandfather: Gerhard Jülich V Count Jülich 1249-1328 5 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandfather: William Jülich V Duke Jülich 6 x Great Grand Son of King William "Conqueror" I of England
Great x 4 Grandmother: Elisabeth Brabant Countess Jülich
Great x 2 Grandfather: Gerhard Jülich VI Count Berg and Ravensberg 7 x Great Grand Son of King William "Conqueror" I of England
Great x 1 Grandmother: Margaret Jülich Countess Cleves and Mark 8 x Great Grand Daughter of King William "Conqueror" I of England
Mother: Catherine La Marck 5 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: King Philip "Fortunate" VI of France 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: King John "The Good" II of France 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Joan "Lame" Burgundy Queen Consort France 3 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandfather: Philip "Bold" Valois II Duke Burgundy 5 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: King John I of Bohemia
6 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandmother: Bonne Luxemburg Queen Consort France 7 x Great Grand Daughter of King William "Conqueror" I of England
Great x 4 Grandmother: Queen Elizabeth of Bohemia
Great x 1 Grandfather: John "Fearless" Valois Duke Burgundy 3 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Louis Dampierre II Count Nevers I Count Flanders 1304-1346 7 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandfather: Louis Dampierre III Count Nevers II Count Flanders 1330-1384 6 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Margaret Capet Countess Nevers amd Flanders 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Margaret Dampierre Duchess Burgundy 2 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: John Brabant III Duke Brabant 1300-1355 Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Margaret Brabant Countess Nevers and Flanders Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Marie Évreux Duchess of Brabant 2 x Great Grand Daughter of King Henry III of England
GrandMother: Marie Valois Duchess Cleves 4 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: Louis "Strict" Wittelsbach II Duke Upper Bavaria
2 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 3 Grandfather: Louis Wittelsbach IV Holy Roman Emperor 3 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Matilda Habsburg Duchess Bavaria
Great x 2 Grandfather: Albert Wittelsbach I Duke Bavaria 4 x Great Grand Son of King Henry "Curtmantle" II of England
Great x 4 Grandfather: William Hainault I Count Hainault III Count Avesnes III Count Holland II Count Zeeland 6 x Great Grand Son of King William "Conqueror" I of England
Great x 3 Grandmother: Margaret Hainault Holy Roman Empress 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 4 Grandmother: Joan Valois Countess Zeeland Holland Avesnes and Hainault 4 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 1 Grandmother: Margaret Wittelsbach Duchess Burgundy 5 x Great Grand Daughter of King Henry "Curtmantle" II of England
Great x 2 Grandmother: Margaret Silesia