Paternal Family Tree: King Alexander I of Scotland
Maternal Family Tree: King Alexander I of Scotland
King Alexander I of Scotland and Sybilla Fitzroy Queen Consort Scotland were married. She by marriage Queen Consort Scotland. She the illegitmate daughter of King Henry I "Beauclerc" England and Sybilla Corbet. He the son of King Malcolm III of Scotland and Margaret Wessex Queen Consort Scotland.
Before 1060 [his father] King Malcolm III of Scotland [aged 28] and Ingibiorg Finnsdottir Queen Consort Scotland were married. She by marriage Queen Consort Scotland. He the son of [his grandfather] King Duncan I of Scotland and [his grandmother] Bethóc Unknown Queen Consort Scotland.
Flowers of History. Before 25th December 1066. [his mother] Queen Margaret [aged 21] had six sons and two daughters, three of whom, namely, [his brother] Edgar, Alexander, and David, became kings, as they were entitled to by the nobility of their family, and through them the noble blood of the kings of England, who were expelled from their own proper territories by the Normans, devolved upon the kings of Scotland.
Before 1070 [his father] King Malcolm III of Scotland [aged 38] and [his mother] Margaret Wessex Queen Consort Scotland [aged 24] were married. She by marriage Queen Consort Scotland. He the son of [his grandfather] King Duncan I of Scotland and [his grandmother] Bethóc Unknown Queen Consort Scotland.
Around 1078 King Alexander I of Scotland was born to King Malcolm III of Scotland [aged 46] and Margaret Wessex Queen Consort Scotland [aged 33].
Around 1087 [his brother-in-law] Eustace Flanders III Count Boulogne and [his sister] Mary Dunkeld Countess Boulogne [aged 5] were married. She the daughter of [his father] King Malcolm III of Scotland [aged 55] and [his mother] Margaret Wessex Queen Consort Scotland [aged 42]. He the son of Eustace II Count Boulogne [aged 72] and Ida of Lorraine Countess Boulogne [aged 47]. They were half sixth cousins.
Around 1087 Eustace II Count Boulogne [aged 72] died. His succeeded son [his brother-in-law] Eustace succeeded III Count Boulogne. [his sister] Mary Dunkeld Countess Boulogne [aged 5] by marriage Countess Boulogne.
On 13th November 1093 the Battle of Alnwick was fought at Alnwick, Northumberland [Map] between the forces of [his father] King Malcolm III of Scotland [aged 62] and Robert de Mowbray 1st Earl Northumbria.
King Malcolm III of Scotland was killed at The Peth Alnwick [Map]. His succeeded son [his half-brother] Duncan [aged 33] succeeded II King Scotland. He died a year minus day later.
Malcolm's son [his brother] Edward Dunkeld was killed.
Edward Dunkeld: he was born to King Malcolm III of Scotland and Margaret Wessex Queen Consort Scotland. On 16th November 1093 Margaret Wessex Queen Consort Scotland died three days after her husband King Malcolm III of Scotland and her son Edward Dunkeld were killed at the Battle of Alnwick.
On 16th November 1093 [his mother] Margaret Wessex Queen Consort Scotland [aged 48] died three days after her husband [his father] King Malcolm III of Scotland [deceased] and her son [his brother] Edward Dunkeld were killed at the Battle of Alnwick.
On 12th November 1094 [his half-brother] King Duncan II of Scotland [aged 34] ambushed and killed in battle. His succeeded uncle Donald [aged 62] succeeded III King Scotland.
In 1099 [his uncle] King Donald III of Scotland [aged 67] died. He was buried at Dunfermline Abbey [Map] and subsequently reburied in Iona. His succeeded nephew [his brother] Edgar [aged 25] succeeded I King Scotland.
On 11th November 1100, three months after acceeding to the throne, [his brother-in-law] King Henry I "Beauclerc" England [aged 32] and [his sister] Matilda of Scotland [aged 20] were married. She was crowned Queen Consort England. Baptised Edith she took the regnal name Matilda. The marriage brought together the houses of Normandy and Wessex; she was a great granddaughter of King Edmund I of England. She the daughter of [his father] King Malcolm III of Scotland and [his mother] Margaret Wessex Queen Consort Scotland. He the son of King William "Conqueror" I of England and Matilda Flanders Queen Consort England.
On 8th January 1107 King Edgar I of Scotland [aged 33] died. His succeeded brother Alexander [aged 29] succeeded I King Scotland.
Chronicle of Geoffrey le Baker of Swinbroke
Baker was a secular clerk from Swinbroke, now Swinbrook, an Oxfordshire village two miles east of Burford. His Chronicle describes the events of the period 1303-1356: Gaveston, Bannockburn, Boroughbridge, the murder of King Edward II, the Scottish Wars, Sluys, Crécy, the Black Death, Winchelsea and Poitiers. To quote Herbert Bruce 'it possesses a vigorous and characteristic style, and its value for particular events between 1303 and 1356 has been recognised by its editor and by subsequent writers'. The book provides remarkable detail about the events it describes. Baker's text has been augmented with hundreds of notes, including extracts from other contemporary chronicles, such as the Annales Londonienses, Annales Paulini, Murimuth, Lanercost, Avesbury, Guisborough and Froissart to enrich the reader's understanding. The translation takes as its source the 'Chronicon Galfridi le Baker de Swynebroke' published in 1889, edited by Edward Maunde Thompson.
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Anglo-Saxon Chronicle. 1107. This year died Maurice, Bishop of London, and Robert, Abbot of St. Edmund's bury, and Richard, Abbot of Ely. This year also died the King Edgar in Scotland [aged 33], on the ides of January, and Alexander [aged 29] his brother succeeded to the kingdom, as the King Henry [aged 39] granted him.
After 1111 [his brother] King David I of Scotland [aged 27] and [his sister-in-law] Maud Queen Consort Scotland [aged 37] were married. He by marriage Earl Huntingdon. She the daughter of Waltheof Northumbria 1st Earl of Northampton 1st Earl Huntingdon and Judith Flanders Countess Huntingdon. He the son of [his father] King Malcolm III of Scotland and [his mother] Margaret Wessex Queen Consort Scotland.
In 1116 [his sister] Mary Dunkeld Countess Boulogne [aged 34] died.
On 1st May 1118 [his sister] Edith aka Matilda Dunkeld Queen Consort England [aged 38] died at Westminster Palace [Map]. She was buried at Westminster Abbey [Map].
Chronicon ex Chronicis by Florence and John of Worcester. 25th April 1123. Alexander [aged 45], king of Scots, died on the seventh of the calends of May [25th April].
Note. Some sources say 1124?
On 23rd April 1124 King Alexander I of Scotland [aged 46] died. His succeeded brother David [aged 40] succeeded I King Scotland. Maud Queen Consort Scotland [aged 50] by marriage Queen Consort Scotland.
16th April 1130. The 1130 Battle of Stracathro took place around three miles north of Brechin. The rebellion was led by two pretenders to the Scottish crown, Malcolm Mac Alexander illegitimate son of Alexander I of Scotland, and Angus of Moray who was the grandson of King Lulach who had been deposed and killed by David [aged 46] taking advantage of King David I of Scotland being in England.
[his illegitimate son] Malcolm Mac Alexander was born illegitimately to King Alexander I of Scotland.
Kings Wessex: Great Grand Son of King Edmund "Ironside" I of England
Kings Scotland: Son of King Malcolm III of Scotland
GrandFather: King Duncan I of Scotland 
-2 x Great Grand Son of King Duncan I of Scotland
Father: King Malcolm III of Scotland Son of King Duncan I of Scotland
GrandMother: Bethóc Unknown Queen Consort Scotland
King Alexander I of Scotland Son of King Malcolm III of Scotland
Great x 4 Grandfather: King Edmund I of England Son of King Edward "Elder" of the Anglo Saxons
Great x 3 Grandfather: King Edgar I of England Son of King Edmund I of England
Great x 4 Grandmother: Aelfgifu of Shaftesbury Queen Consort England
Great x 2 Grandfather: King Æthelred II of England Son of King Edgar I of England
Great x 4 Grandfather: Ordgar Earldorman Devon
Great x 3 Grandmother: Aelfthryth Queen Consort England
Great x 1 Grandfather: King Edmund "Ironside" I of England Son of King Æthelred II of England
Great x 3 Grandfather: Thored Northumbria
Great x 2 Grandmother: Aelfgifu of York Queen Consort England
GrandFather: Edward "The Exile" Wessex Son of King Edmund "Ironside" I of England
Great x 1 Grandmother: Ealdgyth Unknown
Mother: Margaret Wessex Queen Consort Scotland Grand Daughter of King Edmund "Ironside" I of England
GrandMother: Agatha