Dudley Marjoribanks, 3rd Baron Tweedmouth

Lieutenant-Colonel Dudley Churchill Marjoribanks, 3rd Baron Tweedmouth, DSO (2 March 1874 – 23 April 1935) was a British army officer and courtier.

Marjoribanks was the son of Edward Marjoribanks, 2nd Baron Tweedmouth and Lady Fanny Spencer-Churchill, daughter of the 7th Duke of Marlborough. He succeeded his father as the 3rd Baron Tweedmouth and is thus descended from Joseph Marjoribanks, a wine and fish merchant in Edinburgh who died in 1635. Joseph Marjoribanks is thought to have been the grandson of Thomas Marjoribanks of Ratho, head of the lowland Clan Marjoribanks.

He was a pupil at Harrow School and joined the Royal Horse Guards in 1895. He was promoted to Lieutenant in 1897 and served with a composite regiment of the Household Cavalry in the Second Anglo-Boer War in South Africa from 1899-1902. He was present at the Relief of Kimberly and several other battles in Orange Free State, the Transvaal Colony and the Cape Colony. He was Mentioned in dispatches, was awarded the Queen's South Africa Medal with six clasps and was appointed a Companion of the Distinguished Service Order by the future King Edward VII in November 1900.

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