27 Jul 1054: avenged family and took the crown by slaying Macbeth, who killed his father, Duncan I. Malcolm was the son of Duncan I who was killed by Macbeth in 1040. He found safe haven in Northumbria and the support of its ruler Earl Siward, who led an army against Macbeth in 1054. Siward and Malcolm defeated Macbeth at the battle of Dunsinnan but although Malcolm's lands were restored to him, he did not dislodge Macbeth from the throne. It wasn't until three years later, on 15 August 1057 at the battle of Lumphanan, that Malcolm again defeated Macbeth. But it was Lulach, Macbeth's stepson and cousin who became king. After less than four months however, Malcolm had Lulach killed and replaced him on the Scottish throne.
d. 13 Nov 1093 Battle of Alnwick, attack allegedly to prevent coming Norman invasion, but he was ambushed by one of his Norman friends named Morel. His wife died three days after. It is assumed that they were both buried at the Monastery of Iona. Killed at the siege of Alnwick, Malcolm was buried first at Tynemouth, before being moved to Dunfermline. A character in Macbeth, as Malcolm, son of Duncan, the King of Scotland--although Shakespeare's chronology had little to do with real life.
m.1 Ingebjörg ____ (d. c1070), widow of Thorfinn "the Black" Jarl of Orkney and Caithness (d. abt 1060/65). There is some evidence she is dau. Finn Arnisson.
Ingibjörg gave birth to a son who became King Duncan II (King of Scotland; 1060-12 Nov 1094; m. Aethelreda of Dunbar [b. by 1094]). There is mention of additional sons, Donald and Malcolm. m. Ingebiorg, widow of the Jarl of Orkney, in 1065. They had 2 sons and a daughter before her death in 1069.
m.2 abt 1071 Margaret of Wessex, dau. Edward "the Exile", son of Edmund Ironside. Issue: 8. m.2 Margaret, dau. Edward Atheling
Edward, who was killed at Alnwick defending father;
Ethelred, Earl of Fife, and Abbot of Dunkeld before its erection into a bishopric, and still under Columbite rule; gave lands of Ardmore to the Culdees of Loch Leven. Buried at St Andrews;
Edmund, once shared throne with uncle, Donald-bain; became a monk after Donald's deposition in the Cluniae Priory of Montague in Somersetshire, and died there in the odour of sanctity. —Sir James Balfour;
Edgar, told his mother about his father's and brother's death at Dunfermline (Turgot, confessor and biographer);
Alexander I, surnamed Fierce, had earldom of Innergoury - given by uncle (Donald-bain) at his baptism;
David I, the Saint;
Matilda m. Henry I, King of England;
Mary m. Eustace, Count de Bulloigne, (bros. Godfrey, King of Jerusalem). Issue: dau. "Matilda" m. Stephen, King of England; From Mary also descended the Dukes de Bulloigne, of whom was the celebrated Turenne, General of Louis XIV.
1058: succeeded father.
25 Apr 1058: Crowned.
Malcolm's rule was marked by many changes when bringing the culture and civilization of England to Scotland. In 1071 however, his reign overcome when Scotland was invaded by William the Conqeror of England who forced Malcolm to pay him homage at Abernethy in Perthshire.
1072: submitted to William I, king of England.
1078: defeated Lulach's son Mael Snechta.
Aug 1093: laid the foundation stone of Durham cathedral. His oath to William didn't prevent him from raiding Northumbria on a regular basis and it was while on such a raid, in August 1093, that he laid the foundation stone of Durham cathedral.
Nov 1093: killed raiding Alnwick. Much of Malcolm's reign was spent pursuing his claim to Northumbria. On his last raid on Northumbria in 1093, he and his son were killed in a treacherous ambush. The king was 63. During his reign, Scotland became more European and cosmopolitan in outlook, due in large part to the Hungarian-raised Queen Margaret. Malcolm was succeeded by his son Edgar, who was killed in battle during the siege of Alnwick Castle, Northumberland, England. Malcolm lived in exile during the reign of his fathers murderer; Macbeth. Malcolm killed Macbeth in battle in 1057. 
(Royal Ancestry) Malcolm III, King of Scots, was killed by Morel of Bamborough at Alnwick, Northumberland 13 Nov. 1093. He was initially buried at Tynemouth, but his son, King Alexander I, later removed his body to Dunfermline, Fife (Scotland). His widow, Margaret, died at Edinburgh Castle 16 Nov. 1093, and was buried before the high altar in the church of the Holy Trinity at Dunfermline, Fife.
(Wikipedia) In 1250 (Margaret's) body and that of her husband were exhumed and placed in a new shrine in the Abbey. In 1560 Mary Queen of Scots had Margaret's head removed to Edinburgh Castle as a relic to assist her in childbirth. In 1597 the head ended up with the Jesuits at the Scots' College, Douai, France, but was lost during the French Revolution. Philip II of Spain had the other remains of Margaret and her husband Malcolm transferred to the Escorial in Madrid (royal mausoleum), but they cannot now be found. (https://en.wikipedia.org/wiki/Saint_Margaret_of_Scotland)
Children- Duncan II, Malcolm, Donald
COD: killed at Alnwick during invasion of England
Buried- Tynemouth, Northumberland, England
Royal Ancestry by Douglas Richardson Vol. III p. 299. MALCOLM III (CEANNMORE), King of Scotts, married [SAINT] MARGARET
Royal Ancestry 2013 Vol. IV p. 576-578
↑ Scottish kings - a revised chronology of Scottish history, 1005-1625. Published 1899 by D. Douglas in Edinburgh. archive.org
↑Paul, James Balfour, Sir, 1846-1931 : The Scots Peerage : Founded On Wood's Ed. Of Sir Robert Douglas's Peerage Of Scotland; Containing An Historical And Genealogical Account Of The Nobility Of That Kingdom : Free Download, Borrow, And Streaming : Internet Archive". 2021. Internet Archive.>Malcolm III, Vol I, pps 1-2