evangelist

From Old French evangeliste, from ecclesiastical Latin evangelista, from ecclesiastical Greek εὐαγγελιστής (euangelistḗs), meaning 'bringer of good news.' That Greek word comes from εὐαγγελίζεσθαι ('to evangelize'), itself from εὐάγγελος ('bringing good news'), built from εὖ ('well') plus ἀγγέλλειν ('to announce').

The word entered English through French and church Latin, carrying its Greek sense of announcing good news straight through each stage.

It shares its root with 'evangelize,' the verb form of the same Greek chain describing the act of spreading good news.