Bible Encyclopedias
Proto

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

(first). This adjective is prefixed to the name of several officers in the Greek Church, denoting that he who holds it is the chief of his class such as prothonotary, protoppaas, protopsaltes, protosyncellus.

Bibliography Information
McClintock, John. Strong, James. Entry for 'Proto'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​p/proto.html. Harper & Brothers. New York. 1870.