Elizabeth Mary Jeffreys FAHA (née Brown, 22 July 1941 – 12 September 2023) was a British scholar of Byzantium.
In 1963 she came to Oxford to study for a Bachelor of Letters (BLitt) in medieval Greek and French at St Anne's College, which she earned with a thesis on fourteenth-century romances.
[6] She spent 1972–74 at the Dumbarton Oaks Center for Byzantine Studies in Washington, DC, where her husband Michael and then herself were visiting fellows for a year each, and where she participated in Cyril Mango's seminar before his establishment in Oxford.
[6] In 1996 Jeffreys was appointed to the chair in Byzantine and Modern Greek Language and Literature at Oxford, as the successor to Cyril Mango, and returned to the United Kingdom.
She held a Leverhulme Emeritus Fellowship in 2008–09[1] and continued to work on the first edition of the twelfth-century Byzantine court poetry conventionally attributed to Manganeios Prodromos.