James Stewart, 1st Earl of Buchan

James Stewart, 1st Earl of Buchan (1442–1499) was a Scottish noble. He was the uncle of James III of Scotland who was granted the Earldom of Buchan. Buchan repaid him by fighting for his cause against rebellious southern barons. Through his marriage to Margaret Ogilvie he acquired the title Lord Auchterhouse.

James Stewart was the second son of Sir James Stewart, the Black Knight of Lorne, and Joan Beaufort, the widow of James I of Scotland. "Hearty James" was a younger brother of John Stewart, 1st Earl of Atholl, and a younger half-brother of James II of Scotland and Princess Margaret Stewart, first wife of Louis XI of France.

In 1467, his nephew James III granted him and his wife the lands of the Baronies of Strathalva and Down, with the Castle of Banff and the fishings of the water of River Deveron. In 1469, James III conferred on James the Earldom of Buchan (first of the third creation). James III conferred the estate of Traquair was on Dr. William Rogers, an eminent musician, and one of his favourites. After holding the lands for upwards of nine years, Dr. Rogers sold them for an insignificant sum, in 1478, to Buchan.

When the southern barons entered into a conspiracy against the King, the Earl of Buchan naturally remained loyal. The King soon crossed the River Forth, and passed into the northeastern counties, where a strong force rallied around him. He then marched southward, and came in sight of the rebellious barons at Blackness in West Lothian, and the Earl of Buchan attacked and drove back the left wing of the insurgent army.

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