The old Barony and castle of Corsehill lay within the feudal Baillerie of Cunninghame, near Stewarton, now East Ayrshire, Scotland. The Lairds of Corsehill Godfrey de Ross was an early holder of the castle and lands of Corsehill, moving his seat here from the castle at Boarland (also 'Borland') or Dunlop hill. The De Ross family are now represented by the Earls of Glasgow. Andrew Cunningham, second son of William Cunningham, 4th Earl of Glencairn, was the first of the House of Corsehill in 1532. In 1532 his father had granted to him the lands of Doura, Potterton, Little Robertland, and the two Corsehills. In 1538 he was also granted Cuttiswray, Clarklands, et Hillhouse. He was a great supporter of the reform movement and had his lands forfeited, later returned and died in 1545. Cuthbert Cunningham, son of Andrew, inherited and married Matilda 'Maud' Cunningham of Aiket Castle. He had two sons, Alexander and Patrick, the latter being involved in the murder of Hugh, Earl of Eglinton. Patrick was murdered in revenge by the Montgomeries. The spelling 'Cunningham' will be used throughout for consistency where it stands alone. Alexander Cunningham inherited and married Marion Porterfield of Duchal. Alexander's son, also Alexander, held the lands of Lambruchton and Thirdpart in 1622 and died in 1667, being succeeded by his grandson, another Alexander Cunningham, who was given the dignity of a baronet in 1672. In 1626 Alexander Cunningham senior of Corsehill is recorded. In 1691 the Hearth Tax records show the 'House of Corsehill' as having ten hearths and suggests that 83 other dwellings were in the barony. David Cunningham was the last to occupy Corsehill House and he then lived at Doura Hall near Kilwinning where he had proposed building himself a new laird's house. In 1685, Alexander, the 2nd baronet, married Margaret Boyle, sister of the Earl of Glasgow. Their son David married Penelope Montgomerie, daughter of Sir Walter Montgomerie of Skelmorlie Castle. Their eldest son married the heiress of Sir David Montgomerie of Lainshaw and adopted the patronym Montgomerie-Cuninghame, however he predeceased his father and it was his son Walter, who never married, that inherited in 1770 and died in March 1814. His brother David became the 5th baronet and also died unmarried in 1814. James, the third brother, inherited and married Jessie, daughter of James Cuming of Earnside, Nairnshire. Sir James died in 1837 and Alexander David inherited,