Sir William Douglas, 4th Baronet of Kelhead, (c. 1730 - 16 May 1783) was a Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

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The son of Sir John Douglas, 3rd Bt of Kelhead and his wife Christian Cunningham, daughter of Sir William Cunningham of Caprington, 2nd Bt., he was a descendant of William Douglas, 1st Earl of Queensberry.

He served as Member of Parliament for Dumfries Burghs between 1768 and 1780.

Lockerbie House was built for Sir William Douglas, his wife Dame Grace Johnstone and their children, of whom the eldest, Charles, succeeded as 6th Marquess of Queensberry

Charles Douglas, 6th Marquess of Queensberry

Charles Douglas, 6th Marquess of Queensberry, KT was a Scottish peer.Douglas was the first son and heir of Sir William Douglas, Bt, and his wife, Grace, née Johnstone. He inherited his father's baronetcy in 1783...

. Their third son, Lord John Douglas, granted the style and precedence of the younger son of a Marquess by Royal Warrant 4 May 1837, later became 7th Marquess of Queensberry

John Douglas, 7th Marquess of Queensberry

John Douglas, 7th Marquess of Queensberry , styled Lord John Douglas from May to December 1837, was a Scottish Whig politician....

. The youngest son, Lord William Robert Keith Douglas was Member of Parliament for Dumfriesshire.