Alexander Stewart was a Scottish nobleman, Earl of Mar from 1404. He acquired the earldom through marriage to the hereditary countess, and successfully ruled the northern part of Scotland.
Biography
He was an illegitimate son of Alexander Stewart, Earl of Buchan and probably Mairead inghean Eachainn. Alexander held the Earldom of Mar and the Lordship of the Gariochjure uxoris, in right of his first wife Isabel Douglas, Countess of Mar. Alexander's marriage to Isabella followed his capture of Kildrummy Castle, and Isabella with it, in 1404. He had forced her to execute a charter settling the reversion to the earldom on himself and his heirs. This act she is believed to have revoked in September, but on marrying him, on 9 December 1404, she granted him the earldom for life, the king confirming this on 21 June 1405. These events shocked the kingdom and Alexander only escaped punishment because he was a close relation to the Royal Family. His possession of the Earldom was later regularised in 1424 by grant of his cousin, King James I. He was a strong supporter of his uncle, Robert Stewart, Duke of Albany, who was then ruler of the kingdom as regent for his brother King Robert III of Scotland. Robert had been badly injured when he was kicked by his horse. Alexander led the so-called "Lowland" army, in fact that of the north-east and eastern Highlands, against Domhnall of Islay, Lord of the Isles at the bloody and indecisive Battle of Harlaw in 1411. Unlike his father, who had been unable to keep the peace in the fractious north-east, Alexander, Walter Bower says, "ruled with acceptance nearly all of the north of the country beyond the Mounth". He achieved this not by using different methods from his father but by his ability to keep his cateran forces in check and to use them to protect his extensive lands when needed; the result was that the lowland areas of Aberdeenshire and Moray were protected. Alexander sat on the jury of 21 knights and peers that convicted his first cousin, Murdoch Stewart, Duke of Albany, and two of his sons of treason in 1424, leading to their execution and the virtual annihilation of the Stewarts of Albany.
Marriages and children
Alexander's first marriage was to Isabel Douglas, Countess of Mar. Alexander later married Marie van Hoorn, daughter of Willem, Lord of Duffel, in 1410. He died without a legitimate male heir and so the Earldom of Mar reverted to the crown. He had two illegitimate children:
