Prosopography of the Later Roman Empire (abbreviated as PLRE) is a work of Roman prosopography published in a set of three volumes collectively describing many of the people attested to have lived in the Roman Empire from AD 260, the date of the beginning of Gallienus' sole rule, to 641, the date of the death of Heraclius.
Individuals who are known only from dubious sources (e.g., the Historia Augusta), as well as identifiable people whose names have been lost, are included with signs indicating the reliability.
The majority of the entries will be persons holding official posts or rank together with their families, and the work will not include clerics except in so far as they come into the above categories.
"[1]The volumes were published by Cambridge University Press, and involved many authors and contributors.
The work is now available on Archive.org https://archive.org/details/prosopography-later-roman-empire/PLRE-I/ The Prosopography of the Byzantine World project aims to extend the coverage to the year 1265.