John Herbert "Jock" Bowes-Lyon (1 April 1886 – 7 February 1930), was the second son of the 14th Earl of Strathmore and Kinghorne and the Countess of Strathmore and Kinghorne, and the brother of Elizabeth Bowes-Lyon (the future Queen Elizabeth and later the Queen Mother).
He was an uncle to Queen Elizabeth II, although he died when she was a small child.