What is "euthalius"

Euthalius was a deacon of Alexandria and later Bishop of Sulca. He lived sometime between the 4th and 7th centuries and is chiefly known through his work on the New Testament in particular as the author of the "Euthalian Sections".

Of Euthalius' activities as a bishop little or nothing is known. Even the location of his episcopal see, Sulca, is a matter of doubt. It can hardly be identified with the bishopric of that name in Sardinia. More likely it was situated somewhere in Egypt, and it has been conjectured that it is the same as Psilka, a city of the Thebaid in the neighbourhood of Syene.