Sir David Bowes-Lyon KCVO was the tenth and youngest child and the sixth son of Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne, and Cecilia Nina Cavendish-Bentinck. He was the younger brother of Queen Elizabeth The Queen Mother and uncle to Queen Elizabeth II.

Claude George Bowes-Lyon, 14th and 1st Earl of Strathmore and Kinghorne,, styled as Lord Glamis from 1865 to 1904, was a British peer and landowner who was the father of Queen Elizabeth The Queen Mother and the maternal grandfather of Queen Elizabeth II.