Beornstan the Archdeacon explained

Beornstan the Archdeacon, also known as Byrnstan, was a medieval Catholic saint from Kent in Anglo-Saxon England.^[1]

Very little is known of the life of this saint and he is known to history mainly through the hagiography of the Secgan Manuscript^[2] and also The Catalogus Sanctorum in Anglia Pausantium.^[3] He was Kentish, an archdeacon and was buried at St Augustine's Abbey so he was probably associated with the early Abbey.

References

1. Book: Blair, John. 2002. A Handlist of Anglo-Saxon Saints. Thacker, Alan. Sharpe, Richard. Local Saints and Local Churches in the Early Medieval West. Oxford. Oxford University Press. 563.
2. Web site: Stowe MS 944 . . https://archive.today/20140103065303/http://www.bl.uk/manuscripts/Viewer.aspx?ref=stowe_ms_944_f029v . 3 January 2014 . dead.
3. [Lambeth Palace#library|Lambeth Palace Library]