Group Captain George Nigel "Geordie" Douglas-Hamilton, 10th Earl of Selkirk, (4 January 1906 – 24 November 1994) was a Scottish nobleman and Conservative politician.
William Douglas-Hamilton, Duke of Hamilton, KG, PC (24 December 1634 – 18 April 1694), was a Scottish nobleman and politician.
 Born Lord William Douglas.
 He was the eldest son of William Douglas, 1st Marquess of Douglas by his second wife Lady Mary Gordon, a daughter of George Gordon, 1st Marquess of Huntly.
Air Commodore Douglas Douglas-Hamilton, 14th Duke of Hamilton and 11th Duke of Brandon (3 February 1903 – 30 March 1973) was a Scottish nobleman and pioneering aviator who, together with D.F. McIntyre, was the first man to fly over Mount Everest.
William Alexander Louis Stephen Douglas-Hamilton, 12th Duke of Hamilton, 9th Duke of Brandon, 2nd Duke of Châtellerault KT (London, 12 March 1845 – Algiers, 16 May 1895) was a Scottish nobleman.
Audrey Florice Durrell Drummond Sale-Barker (1903 in Chelsea, London – 21 December 1994 in Dorset, England), nicknamed Wendy, was a British alpine skiing champion and prominent aviator.
 She was born into high society, the daughter of children's writer Lucy Sale-Barker and Maurice Drummond-Sale-Barker.
 After her marriage to George Douglas-Hamilton, 10th Earl of Selkirk in 1947, she became Audrey Douglas-Hamilton, Countess of Selkirk.
Alexander Douglas Douglas-Hamilton, 16th Duke of Hamilton and 13th Duke of Brandon (born 31 March 1978) is a Scottish nobleman and the Premier Peer of Scotland.
Earl of Ruglen was a title in the Peerage of Scotland.
 Along with the subsidiary titles Viscount of Riccartoun and Lord Hillhouse, it was created on the 14th of April, 1697, for Lord John Douglas-Hamilton, fourth (third surviving) son of William Douglas-Hamilton, Duke of Hamilton, 1st Earl of Selkirk, and his wife Anne Hamilton, 3rd Duchess of Hamilton.
 The 1st Earl of Ruglen succeeded as 3rd Earl of Selkirk on the death of his elder brother in 1739.
 The Earl's only son William, Lord Daer, died in 1742, so on the death of the Earl of Selkirk and Ruglen in 1744, the Earldom of Selkirk passed to his great-nephew, while the Earldom of Ruglen passed to his daughter, Anne, who had married William Douglas, 2nd Earl of March.
 On her death in 1748, the Earldom of Ruglen passed to her only child William, 3rd Earl of March.
 He succeeded his first cousin once removed Charles Douglas as 5th Marquess and 4th Duke of Queensberry in 1778.
James Alexander Douglas-Hamilton, Baron Selkirk of Douglas, (born 31 July 1942), briefly Earl of Selkirk (a title he disclaimed) and previously styled Lord James Douglas-Hamilton as a younger son of the 14th Duke of Hamilton and Brandon, is a Scottish Conservative politician who served as Member of Parliament for Edinburgh West and then as Member of the Scottish Parliament for the Lothians.
 Since 1997 he has been a member of the House of Lords as a life peer.
William, 6th Earl of Douglas (c. 1424 – 24 November 1440) was a short-lived Scottish nobleman.
 In addition to his Earldom of Douglas, he was Earl of Wigtown, Lord of Galloway, Lord of Bothwell, Selkirk and Ettrick Forest, Eskdale, Lauderdale, and Annandale in Scotland, and de jure Duke of Touraine, Count of Longueville, and Lord of Dun-le-roi in France.
 He was the eldest son of Archibald Douglas, 5th Earl of Douglas and Lady Eupheme Graham.
Lieutenant Alfred Douglas Douglas-Hamilton, 13th Duke of Hamilton and 10th Duke of Brandon TD, DL (6 March 1862 – 16 March 1940) was a Scottish nobleman and sailor.

Question: What Scottish nobleman and pioneering aviator is the father of James Alexander Douglas-Hamilton, Baron Selkirk of Douglas?
Answer: Douglas Douglas-Hamilton, 14th Duke of Hamilton