Background
His mother was the author of the verse drama, "The Siege of Jerusalem" (1769).
His mother was the author of the verse drama, "The Siege of Jerusalem" (1769).
He is the great-great-grandfather of Queen Elizabeth The Queen Mother. The eldest brother was John Bowes, 10th Earl of Strathmore and Kinghorne, who had a long affair with Mary Millner. Their only son John Bowes was only legitimized following the demise of his father.
He inherited most of the real estate of his father, but none of his titles.
The second brother was George Bowes-Lyon who had married Mary Thornhill, but died childless on 26 December 1806. Thomas was their only legitimate heir and became the new Earl of Strathmore and Kinghorne on 3 July 1820.
They had two children:
Thomas George Lyon-Bowes, Lord Glamis (6 February 1801 – 27 January 1834). He was the father of both Thomas Lyon-Bowes, 12th Earl of Strathmore and Kinghorne, and Claude Bowes-Lyon, 13th Earl of Strathmore and Kinghorne.
Mary Isabella Lyon-Bowes (8 August 1802 – 11 September 1836).
Married John Walpole Willis. They had a daughter:
Sarah Bowes-Lyon (8 August 1813 – 6 June 1847). Married first George Augustus Campbell and secondly Charles Philip Ainslie.
This marriage was childless but lasted until his death.