Such a person is called a scribe.
Scribes, Bible scholars, scriptorium workers.
Depending on the situation he may be addressed as Father (in person) or Reverend Father (in writing). In Eastern Christianity we use the priest first name (ex. Father James)
Quite simply, he is called a priest.
We would call them "scribes". They called themselves dub-sar (literally, "tablet-writer").
The Parish Priest
A ruling priest is called a Theocrat
the priest is called a father
Only if you are a politician or priest.
When a priest speaks in Church as part of a Liturgy or Service, it is called a Sermon.
Priest were called "the druids" during the anglo saxon
He was the high priest called Caiaphas.
It was scribes and priest