The Keeper of the King's/Queen's Swans was an ancient office in the Royal Household of the Sovereign of England, later Great Britain and ultimately the United Kingdom.
The keeper's office dates from the 13th century; he was supported by three swanherdsmen, and their principal duties related to the annual Swan-Upping on the River Thames.[1]
It was abolished in 1993, when it was replaced by two new offices, the Warden of the Swans and the Marker of the Swans.