Saint Margaret of Scotland (c. 1045 – 16 November 1093), also known as Margaret of Wessex and Queen Margaret of Scotland, was an English princess of the House of Wessex. Born in exile in Hungary, she was the sister of Edgar Ætheling, the short-ruling and uncrowned Anglo-Saxon King of England. Margaret and her family returned to England in 1057, but fled to the Kingdom of Scotland following the Norman conquest of England of 1066. Around 1070 Margaret married Malcolm III of Scotland, becoming his queen consort. She was a pious woman, and among many charitable works she established a ferry across the Firth of Forth for pilgrims travelling to Dunfermline Abbey, which gave the towns of South Queensferry and North Queensferry their names. Margaret was the mother of three kings of Scotland and a queen consort of England. According to the Life of Saint Margaret, attributed to Turgot of Durham, she died at Edinburgh Castle in 1093, just days after receiving the news of her husband's death in battle. In 1250 she was canonised by Pope Innocent IV, and her remains were reinterred in a shrine at Dunfermline Abbey. Her relics were dispersed after the Scottish Reformation and subsequently lost.
http://en.wikipedia.org/wiki/Saint_Margaret_of_Scotland

http://hometown.aol.com/ttrim36387/douglas.html
Holy Rood. A relic of the True Cross, also known as the Black Rood of Scotland, which was brought to Scotland by Queen Margaret, wife of King Malcolm, and guarded by William ``the Seemly'' St. Clair (1028-1070). Both, Holyrood House and Holyrood Abbey, both in Edinburgh, were built to house it. Rumor has it that during the Reformation it was hidden in Rosslyn Chapel.

http://www.newadvent.org/cathen/09655c.htm
http://www.rootsweb.com/~nwa/margaret.html

http://hometown.aol.com/ttrim36387/douglas.html
http://www.royal.gov.uk/history/scotland/early.htm
http://www.scotsheritage.co.uk/Timeline/Timeline2.htm -exerpts:

1057 With the help of Siward, Earl of Northumbria, Malcolm III (nicknamed Canmore or " Big Head "), son of Duncan, recovered his father's throne, slaying Macbeth in battle at Lumphanan in Aberdeenshire.
1070 Malcolm III married the English princess Margaret (St. Margaret), who had taken refuge in Scotland from the Normans. Under the queen's influence Malcolm anglicised his court and the Celtic Church.
1092 Malcolm also made war against the Normans in support of Margaret's brother Edgar, the Aetheling or heir to the throne of England. Scotland lost Cumberland through the fortification of Carlisle by William Rufus.
1093 Malcolm III fell in battle near Alnwick. His death was followed by four years' Celtic reaction against his anglicising policy.

The Annals of Ulster for 1093 say, "Maelcolaim Mac Donnacha sovereign of Alban and Echbarda his son, slain by the Franks. His queen, viz. Margarita, died through grief before the end of (three) days."

http://www.electricscotland.com/webclans/atoc/canmore.html
por algunas lineas de descendencia