Æthelthryth was an East Anglian princess, a Fenland and Northumbrian queen and Abbess of Ely. She is an Anglo-Saxon saint, and is also known as Etheldreda or Audrey, especially in religious contexts. She was a daughter of Anna, King of East Anglia, and her siblings were Wendreda and Seaxburh of Ely, both of whom eventually retired from secular life and founded abbeys.

Threekingham is a village in the North Kesteven district of Lincolnshire, England. The population of the civil parish at the 2011 census was 233. It is situated on the A52 Grantham to Boston road, 6 miles (10 km) south from Sleaford, and close to the A15 Threekingham Bar roundabout. Mareham Lane, the Roman Road aligned with King Street, crosses the A15 at Threekingham.