Arthur John MacLean (1858–1943) was a Scottish Episcopal bishop and author. He served as the Bishop of Moray, Ross, and Caithness for nearly 40 years, and was elected Primus of the Scottish Episcopal Church. Educated at Eton College and King’s College Cambridge, he was ordained in 1882. He served as head of the Archbishop of Canterbury’s Assyrian Mission, rector of Portree, dean of Argyll and The Isles, and principal of the Scottish Episcopal Theological College. He is also the author of Grammar of Vernacular Syriac in English, A Dictionary of the Dialects of Vernacular Syriac, and The Ancient Church Orders.