Lethbridge-Stewart family

The Lethbridge-Stewart family was a storied one. Notable members included Alistair Gordon Lethbridge-Stewart.

Origins
Part of the Scottish clan Stewart, the family was related to the Stuart kings of Scotland, and when James VI arrived to claim the English throne as James I in 1603, the Brigadier's ancestor, William Lethbridge-Stewart, accompanied him. (TV: Terror of the Zygons, PROSE: The Dying Days)

Ancestors of the Brigadier
Alistair came from a military tradition. (COMIC: The Warkeeper's Crown)

Major General Fergus Lethbridge-Stewart was the Duke of Wellington's right-hand man at the Battle of Waterloo on 18 June 1815. (PROSE: The Scales of Injustice)

The Brigadier's paternal grandfather Alistair Lethbridge-Stewart worked for British Intelligence in Russia during World War I. He returned to the United Kingdom in the aftermath of the Russian Revolution of 1917. (PROSE: The Wages of Sin)

The Brigadier also had a great-grandfather Mario. (AUDIO: The Ghosts of N-Space)

Descendants of the Brigadier
The Brigadier had many descendants who played significant roles in the history of Earth.

Mariama and his descendants
As a young officer stationed in Sierra Leone, Lethbridge-Stewart fathered a son with Mariatu, daughter of Chief Yembe of the Royoke village. This son, Mariama, was the father of Kadiatu. Kadiatu authored The Zen Military, an exposé of the activities of UNIT published in 2006.

Kadiatu's great-grandson, Yembe Lethbridge-Stewart, led the UN forces during the Thousand Day War between humans and Ice Warriors in the late 21st century and was the adoptive father of Kadiatu Lethbridge-Stewart, whose time travel activities at first proved quite troublesome for the Seventh Doctor. (PROSE: Transit)

Kate Lethbridge-Stewart and her descendants
With his first wife, Fiona, the Brigadier fathered a daughter named Kate. Kate spent many years estranged from her father. It was not until the events surrounding the Great Intelligence's third attempt to conquer Earth in the 1990s that Lethbridge-Stewart learned Kate had given him a grandson, Gordon. (PROSE: Downtime) By some time after 2013, Kate was one of the leaders of at least the British division of UNIT. (TV: The Power of Three)